Peavey Music Mixer X VCA User Manual
owner’s manual  
(PRELIMINARY COPY)  
X-VCA mixing consoles  
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table of contents  
mono input module  
p. 7  
1
Mic and line inputs  
stereo input module  
Line inputs and stereo returns  
p. 27  
p. 43  
2
3
group module  
VCA groups, audio groups, dynamics, matrix and  
Aux masters  
left, right & mono  
masters  
p. 59  
4
5
6
7
master control section p. 71  
microprocessor control p.89  
vca facilities  
p. 107  
solo/vca edit switch p. 129  
8
9
0
dynamics control  
power supply  
p. 131  
p. 139  
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how to use this manual  
format  
This manual uses a format that is intended to be easy to read, yet technical for those  
who need to know all the details. For feature descriptions, this is done by devoting the  
left side of each page to 1) an overall module picture, 2) a block diagram, and 3) a con-  
trol closeup.These images all pertain to the features and control descriptions on the  
right side of the page.Also, for certain features like the micro processor system and the  
solo system that appear over and over again, references are made to sections devoted  
to these features.  
The intention is to make the manual easy to read while including all the technical details  
needed for getting the most out of the X-VCA console, a flexible and feature-rich addi-  
tion to Crest Audio's growing line of audio mixing console products.  
conventions  
Control Icons  
This manual uses little pictures, or icons to illustrate what the control descriptions are  
referring to.This makes it possible to avoid redundant wording and makes the control  
descriptions clear.  
Switch in the UP, non-activated position  
Switch in DOWN, activated position  
Switch that illuminates when in the DOWN position  
Momentary switch that illuminates when activated  
LED  
LEDthat is on, indicating that it's associated feature is activated  
Potentiometer  
Standard 1/4"TRSjack (used for line level inputs and insert sends)  
1/4"TRSjack with normal switching (used on insert returns)  
Female XLRinput jack  
Male XLRoutput jack  
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mono input module  
X-VCA owner’s manual  
1
panel  
module  
block diagram  
+
48V  
PAD  
LINE  
Ø
GAIN  
30  
20  
40  
50  
12  
72  
+
48V  
AUX 10  
20  
–
1
2
0
+
3
30  
40  
•
6
10  
20  
–
0
+
3
30  
PAD  
LINE  
40  
•
6
PRE  
10  
–
3
4
0
20  
30  
+
3
40  
6
•
•
10  
–
0
20  
+
3
30  
40  
6
Ø
PRE  
6
5
-
12  
20  
–
6
GAIN  
0
+
30  
20  
3
40  
50  
40  
12  
6
6
•
7
-
–
8
0
+
20  
40  
3
6
•
PRE  
12  
72  
1.5  
HF  
Q
.7  
SHELF  
6K  
3
3K  
12K  
1.5  
18K  
20K  
1K  
1.5  
HM  
Q
3
2K  
.7  
4K  
6K  
1K  
400  
8K  
1.5  
LM  
Q
3
500  
.7  
1K  
200  
1.5  
100  
2K  
.7  
1.5  
LF  
Q
3
SHELF  
200  
400  
100  
600  
40  
800  
–
+
EQ  
ON  
FREQ  
80  
200  
40  
20  
400  
HPF  
INSERT  
ON  
C
PAN  
-
-
ODD  
L
R
EVEN  
SAFE  
PREVIEW  
MUTE  
PK  
+8  
0
–6  
SIG  
10  
5
LCR  
M
0
5
-
L
R
PAN ON  
GROUPS  
1
10  
2
3
4
5
6
7
8
15  
20  
30  
40  
50  
SOLO  
VCA  
ASSIGN  
p.6  
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mono input module  
1
features  
phantom power +48V  
The 48V switch should  
not be engaged when  
using standard (dynamic)  
microphones, or other  
sources that do not use  
phantom power.  
a
48 volts DC is applied to pins 2 and 3 on the mic-input XLR connector. This  
option is used with condenser microphones and active direct boxes that require  
an external DC voltage (phantom power) in order to operate.  
pad  
The mic-input signal is attenuated by 20dB to prevent some signals (e.g. kick  
drum or lead vocal) from overloading the preamp stage.The pad is used to bring  
a hot mic-input signal down to a controllable level.The 20dB pad is not functional  
when the LINE switch is depressed.  
line  
If the 48V phantom  
power switch is  
engaged, depressing this  
switch disconnects phantom  
power from the mic input  
XLR.  
The input preamp circuit is set up to accept a mic-level signal. This signal is  
brought in via the XLR mic-input connector located on the rear panel.The 1/4"  
TRS input jack is disabled.  
The input preamp circuit is set up to accept a line-level signal from either  
the XLR mic-input connector or the 1/4"TRS input jack, both located on the rear  
panel.When a plug is inserted into the 1/4"TRS input jack, the XLR mic-input  
connector is disabled.  
+
+
When similar signals  
from different chan-  
nels are combined, phase  
cancellations can occur.  
polarity reverse—ø  
This feature is used for correcting or minimizing polarity and phase related errors.  
For example, occasionally a balanced input connection is reverse-wired before it  
gets to the mixing console.This can happen in microphones, or in snake line inter-  
faces. By using the polarity reverse feature, this type of error can be corrected.  
Reversing the polarity of an  
input signal often corrects  
such phasing errors.  
polarity inverted  
polarity not inverted  
p.7  
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mono input module  
X-VCA owner’s manual  
1
panel  
module  
block diagram  
+
48V  
PAD  
LINE  
Ø
GAIN  
30  
20  
40  
50  
12  
72  
+
48V  
AUX 10  
20  
–
1
2
0
+
3
30  
40  
•
6
10  
20  
–
0
+
3
30  
PAD  
LINE  
40  
•
6
PRE  
10  
–
3
4
0
20  
30  
+
3
40  
6
•
•
10  
–
0
20  
+
3
30  
40  
6
Ø
PRE  
6
5
-
12  
20  
–
6
GAIN  
0
+
30  
20  
3
40  
50  
40  
12  
6
6
•
7
-
–
8
0
+
20  
40  
3
6
•
PRE  
12  
72  
1.5  
HF  
Q
.7  
SHELF  
6K  
3
3K  
12K  
1.5  
18K  
20K  
1K  
1.5  
HM  
Q
3
2K  
.7  
4K  
6K  
1K  
400  
8K  
1.5  
LM  
Q
3
500  
.7  
1K  
200  
1.5  
100  
2K  
.7  
1.5  
LF  
Q
3
SHELF  
200  
400  
100  
600  
40  
800  
–
+
EQ  
ON  
FREQ  
80  
200  
40  
20  
400  
HPF  
INSERT  
ON  
C
PAN  
-
-
ODD  
L
R
EVEN  
SAFE  
PREVIEW  
MUTE  
PK  
+8  
0
–6  
SIG  
10  
5
LCR  
M
0
5
-
L
R
PAN ON  
GROUPS  
1
10  
2
3
4
5
6
7
8
15  
20  
30  
40  
50  
SOLO  
VCA  
ASSIGN  
p.8  
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mono input module  
1
features  
If the channel peak  
LED is illuminated,  
first try lowering  
gain  
+
The Input gain control range is closely related to the status of the PAD switch and  
the input gain control.  
the LINE switch. In order to establish proper gain structure in the console, input  
Only when this method is  
unsuccessful should the pad  
switch be engaged.  
gain settings must be set correctly.  
LINE—switch-up  
PAD—switch-up  
15 to 75dB of gain can be added the mic-input signal.  
The impedance at the input XLR is 4kΩ.  
LINE—switch-up  
PAD—switch-down  
-5 to 55dB of gain can be added to the mic-input signal.  
The impedance at the input XLR is 4kΩ.  
LINE—switch-down  
PAD—switch-up or -down  
-10 to 45dB of gain can be added the line-input signal.  
The impedance at the input XLR and input 1/4"TRS is 20kΩ.  
p.9  
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mono input module  
X-VCA owner’s manual  
1
block diagram  
panel  
module  
AUX 10  
20  
–
1
2
+
48V  
0
0
+
3
PAD  
LINE  
30  
Ø
GAIN  
30  
20  
40  
40  
6
50  
•
12  
72  
10  
20  
–
AUX 10  
20  
–
1
2
0
0
+
3
30  
+
3
40  
•
6
10  
20  
–
+
3
30  
30  
40  
•
6
40  
PRE  
10  
6
•
–
3
4
0
20  
30  
+
3
40  
6
•
•
10  
–
PRE  
0
20  
+
3
30  
40  
6
10  
–
3
4
PRE  
6
0
0
5
-
20  
30  
+
3
12  
20  
–
6
0
+
3
40  
12  
6
6
•
7
-
–
8
0
40  
+
20  
40  
6
3
•
•
6
•
10  
–
PRE  
1.5  
HF  
20  
Q
+
3
.7  
SHELF  
3
6K  
30  
40  
3K  
12K  
1.5  
18K  
20K  
6
1K  
1.5  
HM  
Q
3
2K  
.7  
PRE  
4K  
6K  
1K  
5
-
6
400  
8K  
1.5  
LM  
Q
–
12  
6
0
3
500  
.7  
1K  
+
200  
1.5  
20  
3
100  
2K  
.7  
1.5  
LF  
Q
40  
12  
6
3
•
SHELF  
7
-
200  
400  
6
100  
600  
–
8
40  
800  
–
0
+
+
EQ  
ON  
FREQ  
20  
40  
80  
200  
3
40  
20  
400  
HPF  
6
•
INSERT  
ON  
C
PAN  
PRE  
-
-
ODD  
L
R
EVEN  
SAFE  
PREVIEW  
MUTE  
PK  
+8  
0
–6  
SIG  
10  
5
LCR  
M
0
5
-
L
R
PAN ON  
GROUPS  
1
10  
2
3
4
5
6
7
8
15  
20  
30  
40  
50  
SOLO  
VCA  
ASSIGN  
p.10  
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mono input module  
1
aux send features  
Eight auxiliary sends are available for creating individual output mixes. These can  
be used to drive effects processors, provide monitor mixes, create broadcast or  
alternate sound reinforcement mixes, or for other special requirements. Each pair  
of odd/even Aux buses (1&2, 3&4, etc.) can be treated as individual discrete mono  
sends, or as stereo pairs. Discrete mono or stereo pair mods are selected global-  
ly for each aux pair via mode switched in the Aux master section, located at the  
top of the Group modules.  
It's typical to  
make Aux sends  
Post fader when driving  
+
effects, and Pre fader when  
mixing for monitors.  
Aux sends 1-2, 3-4  
These knobs adjust the amount of signal sent to the first four AUX buses.  
Unity gain occurs at the he zero setting.  
In mono mode, each control independently determines the send level for the  
respective aux mix. When stereo mode is selected, the top (odd numbered) con-  
trol sets signal level while the bottom (even numbered) control pans the signal  
between odd and even auxiliary mix buses (odd = left, even = right).  
Aux PRE switches 1-2, 3-4,  
The Aux PRE switches determine the source for each pair of AUX sends.The sig-  
nal that these switches use for the PRE setting can be further defined by changing  
the position of a couple of internal jumpers. See INTERNAL JUMPER  
OPTIONS.  
AUX SENDS are post-insert, post-eq, post-mute, post-fader  
AUX SENDS are post-insert, post-eq, post-mute, pre-fader  
Aux sends 5-6, 7-8 (Dual Concentric)  
In mono mode, the inner knobs control levels for aux 5 and 7, respectively.  
The outer knobs control levels for aux 6 and 8, respectively. When stereo mode  
is selected for either of the odd/even aux pairs, the center knobs become the  
level controls and the outer knobs become the pan controls.  
Aux 5-6 & 7-8 PRE switch  
See "Aux PRE switches 1-2, 3-4" above.This button functions the same  
way, however it selects the signal source for Aux's 5, 6, 7 & 8.  
p.11  
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mono input module  
X-VCA owner’s manual  
1
panel  
module  
block diagram  
+
48V  
1.5  
PAD  
LINE  
HF  
Q
Ø
GAIN  
30  
20  
40  
50  
.7  
SHELF  
12  
72  
3
AUX 10  
20  
–
1
2
0
0
+
3
6K  
30  
40  
•
6
3K  
10  
20  
–
12K  
+
3
30  
40  
•
6
PRE  
10  
1.5  
–
3
4
18K  
0
20  
30  
+
3
40  
6
•
•
20K  
1K  
10  
–
0
20  
+
3
30  
40  
1.5  
HM  
6
Q
PRE  
6
5
-
12  
20  
–
6
0
+
3
40  
12  
6
6
•
7
-
–
8
3
2K  
.7  
0
+
20  
40  
3
6
•
4K  
1K  
PRE  
1.5  
HF  
Q
6K  
.7  
SHELF  
6K  
3
3K  
12K  
1.5  
18K  
20K  
1K  
400  
8K  
1.5  
HM  
Q
1.5  
LM  
3
2K  
.7  
Q
4K  
6K  
1K  
400  
8K  
1.5  
LM  
Q
3
500  
.7  
3
500  
.7  
1K  
200  
1.5  
1K  
100  
2K  
.7  
1.5  
200  
LF  
Q
1.5  
3
SHELF  
200  
400  
100  
600  
40  
800  
–
100  
2K  
+
EQ  
ON  
FREQ  
1.5  
80  
LF  
200  
Q
40  
20  
400  
HPF  
INSERT  
ON  
.7  
SHELF  
C
3
PAN  
200  
-
-
ODD  
L
R
EVEN  
400  
SAFE  
PREVIEW  
MUTE  
100  
600  
800  
PK  
+8  
0
–6  
40  
10  
5
SIG  
LCR  
– +  
EQ  
ON  
M
-
0
5
L
R
PAN ON  
FREQ  
GROUPS  
1
10  
2
3
4
5
6
7
8
15  
20  
30  
40  
50  
SOLO  
VCA  
ASSIGN  
p.12  
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mono input module  
1
EQ features  
Many audio signals coming into the console require some degree of corrective eq  
in order to be part of a good sounding mix.The X-VCA offers an uncompro-  
mised, full parametric EQ on each channel.  
The input EQ consists of four full parametric bands: high, high-mid, low-mid, and  
low. The high and low bands are independently switchable for either adjustable  
bandwidth or shelving mode. All bands offer a generous overlap of adjacent oper-  
ating frequencies. An independent, variable high pass filter provides additional  
problem-solving flexibility.  
high frequency—HF  
Bandwidth A Q range of 3.0 to 0.7 (0.5 octave to 2.0 octave) is available.  
Turning the control full clockwise switches operation to a plus/minus shelving  
mode.  
Boost / Cut (inner knob)15dB boost and cut.  
Frequency (outer knob) Continuously sweepable between 1kHz and  
When boosting or cut-  
ting EQ, it is often  
20kHz  
+
necessary to compensate  
for cumulative level  
high mid—HM  
changes. This is best done  
with the Input Gain control  
Bandwidth A Q range of 3.0 to 0.7 (0.5 octave to 2.0 octave) is available.  
Boost / Cut (inner knob)15dB boost and cut.  
Frequency (outer knob) Continuously sweepable between 400 Hz and 8  
kHz.  
Low mid—LM  
Bandwidth A Q range of 3.0 to 0.7 (0.5 octave to 2.0 octave) is available.  
Boost / Cut (inner knob)15dB boost and cut.  
Frequency (outer knob) Continuously sweepable between 100 Hz and 2  
kHz.  
Low frequency—LF  
Bandwidth A Q range of 3.0 to 0.7 (0.5 octave to 2.0 octave) is available.  
Turning the control full clockwise switches operation to a plus/minus shelving  
mode.  
Boost / Cut (inner knob)15dB boost and cut.  
Frequency (outer knob) Continuously sweepable between 40 Hz and 800  
kHz.  
eq on  
Equalizer is on. This switch is used to activate the EQ section and can be  
used to make A/B comparisons between "flat" and eq'd signals.  
p.13  
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mono input module  
X-VCA owner’s manual  
1
panel  
module  
block diagram  
.7  
SHELF  
200  
400  
+
48V  
3
PAD  
LINE  
Ø
GAIN  
30  
20  
40  
100  
50  
12  
72  
600  
AUX 10  
20  
–
1
2
0
0
+
3
30  
40  
•
6
10  
20  
–
40  
800  
– +  
+
3
30  
40  
•
6
EQ  
ON  
PRE  
10  
–
3
4
0
20  
30  
+
3
FREQ  
40  
6
•
•
10  
–
0
20  
+
3
80  
30  
40  
200  
6
PRE  
6
40  
5
-
12  
20  
–
6
0
+
3
40  
12  
6
6
•
20  
400  
7
-
–
8
0
+
20  
40  
3
6
•
HPF  
PRE  
1.5  
HF  
Q
.7  
SHELF  
3
6K  
INSERT  
ON  
3K  
12K  
1.5  
18K  
20K  
1K  
1.5  
HM  
C
Q
PAN  
3
2K  
.7  
4K  
6K  
1K  
400  
8K  
1.5  
LM  
Q
3
500  
.7  
1K  
200  
1.5  
100  
2K  
.7  
1.5  
LF  
Q
3
SHELF  
200  
400  
100  
600  
40  
800  
–
+
EQ  
ON  
FREQ  
80  
200  
40  
20  
400  
HPF  
INSERT  
ON  
C
PAN  
-
-
ODD  
L
R
EVEN  
SAFE  
PREVIEW  
MUTE  
PK  
+8  
0
–6  
SIG  
10  
5
LCR  
M
0
5
-
L
R
PAN ON  
GROUPS  
1
10  
2
3
4
5
6
7
8
15  
20  
30  
40  
50  
SOLO  
VCA  
ASSIGN  
p.14  
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mono input module 1  
high-pass filter—HPF  
Proper use of the high-pass filter reduces or eliminates unwanted low frequencies  
without substantially affecting the program material. Quite often such unwanted  
low frequencies are included with in-coming mic- or line-input signals. For exam-  
ple, stage rumble or wind can be picked up through vocal mics.The slope of the  
high-pass filter is 12dB per octave.  
Many microphones  
have a built-in switch-  
able high-pass filter.  
+
HPF  
High-pass filter is on.  
HPF—variable control  
When the high-pass filter is on, this control selects a frequency between  
20Hz and 400Hz as the point where attenuation begins.  
p.15  
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mono input module  
X-VCA owner’s manual  
1
panel  
module  
block diagram  
600  
+
48V  
40  
800  
PAD  
LINE  
– +  
EQ  
ON  
Ø
GAIN  
30  
20  
40  
FREQ  
50  
12  
72  
AUX 10  
20  
–
1
2
0
0
+
3
80  
200  
30  
40  
•
6
10  
20  
–
+
3
40  
20  
30  
40  
•
6
PRE  
10  
–
3
4
400  
0
20  
30  
+
3
40  
6
•
•
10  
–
0
20  
HPF  
+
3
30  
40  
6
PRE  
6
5
-
12  
20  
–
6
0
INSERT  
ON  
+
3
40  
12  
6
6
•
7
-
–
8
0
+
C
20  
40  
PAN  
3
6
•
PRE  
1.5  
HF  
Q
.7  
SHELF  
6K  
3
3K  
12K  
-
-
ODD  
L
R
EVEN  
1.5  
18K  
20K  
SAFE  
PREVIEW  
1K  
1.5  
HM  
Q
3
2K  
.7  
4K  
6K  
1K  
400  
8K  
1.5  
LM  
Q
3
500  
.7  
1K  
200  
1.5  
100  
2K  
.7  
1.5  
LF  
Q
3
SHELF  
200  
400  
100  
600  
40  
800  
–
+
EQ  
ON  
FREQ  
80  
200  
40  
20  
400  
HPF  
INSERT  
ON  
C
PAN  
-
-
ODD  
L
R
EVEN  
SAFE  
PREVIEW  
MUTE  
PK  
+8  
0
–6  
SIG  
10  
5
LCR  
M
0
5
-
L
R
PAN ON  
GROUPS  
1
10  
2
3
4
5
6
7
8
15  
20  
30  
40  
50  
SOLO  
VCA  
ASSIGN  
p.16  
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mono input module  
1
Insert features  
Insert O N switch  
The Insert point is located after the EQ and before the Low Pass Filter.  
External signal processors can be inserted into the channel via 1/4" TRS  
connectors (send and return) on the rear panel.The SEND signal is unbal-  
anced and the RETURN can accept both unbalanced and balanced signals.  
If you are using a  
something like an  
+
external tube mic preamp,  
you can bypass the chan-  
nel's input preamp by com-  
ing into the insert return  
jack.  
Insert is switched OUT.Any signal coming into the Insert RETURN  
jack is left unused.The Insert SEND jack can be used to derive a post-EQ,  
pre-LPF output from the channel without interrupting the channel's normal  
signal flow.  
Insert is switched IN.The Insert RETURN jack is activated.The  
RETURN jack can also be used as an input for situations where the mic  
preamp and it's associated features are not required, such as when using an  
external mic preamp.  
pan control  
See description of Bus Assignment features later in this section  
safe preview  
LED  
Safe Preview LED  
See LOCAL MICROPROCESSOR CONTROL section  
mute  
Mute switch  
See LOCAL MICROPROCESSOR CONTROL section  
write-in label  
This label may be written on with a grease-marker, or dry-erase pen and later  
wiped clean. Masking tape may also be placed on this surface, if desired. If you  
write on it with a "Sharpie", you may have trouble getting the writing off. If this is  
the case, your best bet is to wipe the label off with isopropyl (rubbing) alcohol.  
p.17  
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mono input module  
X-VCA owner’s manual  
1
panel  
module  
block diagram  
PK  
+
48V  
+
8
0
6
PAD  
LINE  
–
10  
5
SIG  
Ø
GAIN  
30  
20  
40  
50  
12  
72  
LCR  
M
AUX 10  
20  
–
1
2
0
0
+
3
30  
40  
•
6
10  
20  
–
+
3
30  
40  
•
6
PRE  
10  
0
5
–
3
4
-
L R  
0
20  
30  
+
3
40  
6
•
•
PAN ON  
10  
–
0
20  
+
3
30  
40  
6
PRE  
6
5
-
GROUPS  
1
12  
20  
–
6
0
+
3
40  
12  
6
6
–
•
7
-
8
0
+
20  
40  
3
10  
2
3
4
5
6
7
8
6
•
PRE  
1.5  
HF  
Q
.7  
SHELF  
6K  
3
15  
20  
3K  
12K  
1.5  
18K  
20K  
1K  
1.5  
HM  
Q
3
2K  
.7  
4K  
6K  
1K  
400  
8K  
30  
1.5  
LM  
Q
3
500  
.7  
1K  
40  
50  
200  
1.5  
100  
2K  
.7  
1.5  
LF  
Q
3
SHELF  
200  
400  
100  
600  
40  
800  
–
+
EQ  
ON  
FREQ  
80  
200  
40  
20  
400  
HPF  
SOLO  
INSERT  
ON  
VCA  
C
PAN  
ASSIGN  
-
-
ODD  
L
R
EVEN  
SAFE  
PREVIEW  
MUTE  
PK  
+8  
0
–6  
SIG  
10  
5
LCR  
M
0
5
-
L
R
PAN ON  
GROUPS  
1
10  
2
3
4
5
6
7
8
15  
20  
30  
40  
50  
SOLO  
VCA  
ASSIGN  
p.18  
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mono input module  
1
level meter features  
level meter  
LED  
LED  
LED  
LED  
LED  
Each input includes a five-segment LED meter for visu-  
ally monitoring signal levels.This is essential for setting up and maintaining proper  
gain structure.  
Occasional flashing of the  
peak LED is acceptable,  
but frequent flashes indi-  
cate that channel levels  
must be lowered.  
®
peak indicator—PK  
LED  
The input signal is monitored at several points throughout the channel.  
These points are the mic preamp, the EQ stage and the fader stage. Overloads at  
any of these stages will cause the red peak-LED to light.  
Then the channel gain should reduced.  
signal level LED’s  
LED  
These three LED's light up at +8—yellow, 0—green, and -6 dB—green.This  
level range -6 to +8 is the optimum operating range. Compressed or relatively  
constant signals should remain close to 0.  
signal present indicator—SIG  
LED  
This green-LED varies in brightness in response to signal levels between -40  
dB and -6 dB.  
p.19  
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mono input module  
X-VCA owner’s manual  
1
panel  
module  
block diagram  
+
48V  
PAD  
LINE  
C
PAN  
Ø
GAIN  
30  
20  
40  
50  
12  
72  
AUX 10  
20  
–
1
2
-
-
0
0
ODD  
L
R
EVEN  
+
3
30  
40  
•
6
SAFE  
PREVIEW  
10  
20  
–
+
3
30  
40  
•
6
PRE  
10  
–
3
4
MUTE  
0
20  
30  
+
3
40  
6
•
•
10  
–
0
20  
+
3
30  
40  
6
PRE  
6
5
-
12  
20  
–
6
0
+
3
40  
12  
6
6
•
7
-
–
8
0
+
20  
40  
3
6
•
PK  
PRE  
+
8
0
6
1.5  
HF  
Q
–
.7  
SHELF  
6K  
3
10  
5
SIG  
3K  
12K  
1.5  
18K  
20K  
1K  
1.5  
HM  
Q
LCR  
3
2K  
.7  
4K  
6K  
1K  
M
400  
8K  
1.5  
LM  
Q
0
5
3
500  
.7  
1K  
-
L R  
200  
1.5  
PAN ON  
100  
2K  
.7  
1.5  
LF  
Q
3
SHELF  
200  
GROUPS  
1
400  
100  
600  
40  
800  
–
+
EQ  
ON  
FREQ  
80  
200  
10  
2
3
4
5
6
7
8
40  
20  
400  
HPF  
INSERT  
ON  
15  
20  
C
PAN  
-
-
ODD  
L
R
EVEN  
SAFE  
PREVIEW  
MUTE  
PK  
+8  
0
–6  
30  
10  
5
SIG  
LCR  
40  
50  
M
0
5
-
L
R
PAN ON  
GROUPS  
1
10  
2
3
4
5
6
7
8
15  
20  
30  
40  
50  
SOLO  
VCA  
SOLO  
VCA  
ASSIGN  
ASSIGN  
p.20  
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mono input module  
1
bus assignment features  
The Input bus assignment section offers considerable flexibility for creating what  
eventually becomes the main output mix. Such features as LCR,GROUP PAN ON and  
eight-individual group assignments allow several approaches to building the  
desired mix.All assignments are derived post-fader, post-eq, and post-mute.  
If the channel's  
pan control  
Left/Right signal goes  
way when the Pan pot is at  
center, check to see if the  
LCR button is down.  
+
The pan control positions the signal within the stereo left/right field,  
(or between left center or center right in LCR mode).The signal must be assigned  
/
/
to either LCR or the L-R bus for the pan control to have any affect.  
left-center-right—LCR  
This feature is used to precisely position a signal in a sound system with a center  
speaker cluster in addition to left and right clusters.The PAN control becomes an  
integral part of how the input-signal is sent to the LEFT,CENTER, and RIGHT outputs.  
The post-fader signal is assigned to the LEFT,RIGHT, and MONO/CENTER buses.  
Relative amounts of the signal fed to each bus is determined by the position of  
the PAN control.  
mono assignment—M  
The signal is assigned to the discrete mono bus.  
When the LCR button is depressed, this switch is bypassed.  
left / right assignment—L-R  
The Input signal is assigned to the main Left and Right output buses, deriving  
its signal after the channels pan system.When the LCR button is depressed, this  
switch is bypassed.  
pan on—groups—PAN ON  
The eight GROUP assignment switches assign the input signal in mono, inde-  
pendent of the pan pot.  
The eight GROUP assignment switches assign signals as four stereo-pairs.The  
PAN control governs the stereo placement of the four stereo-pairs, which are now  
configured as odd–left / even–right.  
For example: GROUP 1—left, GROUP 2—right, GROUP 3—left, GROUP 4—right, ...con-  
tinuing through GROUP 8.  
group 1–8 assignment  
The input channel's post-fader signal is assigned to the corresponding GROUP  
bus(es). see—pan on—groups  
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mono input module  
X-VCA owner’s manual  
1
panel  
module  
block diagram  
+
48V  
PAD  
LINE  
Ø
GAIN  
30  
20  
40  
50  
12  
72  
PK  
8
AUX 10  
20  
–
1
2
0
0
+
3
+
30  
40  
•
6
0
6
10  
20  
–
+
3
–
30  
10  
5
40  
•
SIG  
6
PRE  
10  
–
3
4
0
20  
30  
+
3
LCR  
M
40  
6
•
•
10  
–
0
20  
+
3
30  
40  
6
PRE  
6
5
-
12  
20  
–
6
0
+
0
5
3
-
40  
12  
L R  
6
6
–
•
7
-
8
0
+
PAN ON  
20  
40  
3
6
•
PRE  
1.5  
HF  
Q
GROUPS  
1
.7  
SHELF  
6K  
3
3K  
12K  
1.5  
18K  
20K  
1K  
1.5  
HM  
10  
Q
2
3
4
5
6
7
8
3
2K  
.7  
4K  
6K  
1K  
400  
8K  
15  
20  
1.5  
LM  
Q
3
500  
.7  
1K  
200  
1.5  
100  
2K  
.7  
1.5  
LF  
Q
3
SHELF  
200  
30  
400  
100  
600  
40  
800  
–
+
EQ  
ON  
40  
50  
FREQ  
80  
200  
40  
20  
400  
HPF  
INSERT  
ON  
C
PAN  
-
-
ODD  
L
R
EVEN  
SAFE  
PREVIEW  
MUTE  
SOLO  
VCA  
PK  
+8  
0
–6  
ASSIGN  
10  
5
SIG  
LCR  
M
0
5
-
L
R
PAN ON  
GROUPS  
1
10  
2
3
4
5
6
7
8
15  
20  
30  
40  
50  
SOLO  
VCA  
ASSIGN  
p.22  
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mono input module  
1
features  
input fader  
The input fader is the primary level control for signals being sent to any of the  
consoles mix buses.The signals affected are the AUX sends selected to be pre-  
fader.The fader offers greater than 80dB of attenuation and up to 10dB of boost .  
Normal operation is between -10 and 0.  
When VCA faders  
become dirty or worn,  
they do not become noisy  
because there's no audio  
going through them.  
+
The fader itself is a 100mm 10K linear taper slide potentiometer. It controls the  
voltage to the channel'sVCA. No audio passes through the fader.  
solo switch  
Pressing this momentary switch will include (illuminate) or exclude (not-illu-  
minated) the channel from the consoles solo system.  
See SOLO /VCA Edit switch section.  
p.23  
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mono input module  
X-VCA owner’s manual  
1
block diagram  
module rear  
Direct  
Out  
Direct  
Out  
Direct  
Out  
Direct  
Out  
Direct  
Out  
Direct  
Out  
Direct  
Out  
Direct  
Out  
S
e
n
d
S
e
n
d
S
e
n
d
S
e
n
d
S
e
n
d
S
e
n
d
S
e
n
d
S
e
n
I
I
I
I
I
I
I
I
n
s
e
r
t
n
s
e
r
t
n
s
e
r
t
n
s
e
r
t
n
s
e
r
t
n
s
e
r
t
n
s
e
r
t
n
s
e
r
d
R
e
t
R
e
t
R
e
t
R
e
t
R
e
t
R
e
t
R
e
t
R
e
t
t
u
r
u
r
u
r
u
r
u
r
u
r
u
r
u
r
n
n
n
n
n
n
n
n
Bal Line In  
Bal Line In  
Bal Line In  
Bal Line In  
Bal Line In  
Bal Line In  
Bal Line In  
Bal Line In  
Bal Mic In  
Bal Mic In  
Bal Mic In  
Bal Mic In  
Bal Mic In  
Bal Mic In  
Bal Mic In  
Bal Mic In  
p.24  
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mono input module  
2
rear panel features  
direct out 1/4" TRS jack  
The input channel's signal is available at this output jack.The default sig-  
nal routing is derived post-fader, post-eq and post-mute.This output jack is  
ground-compensated.  
insert points  
Separate 1/4"TRS jacks provide the facilities for inserting an external signal  
processor into the signal path of the input channel.  
insert send  
This jack serves as an output for connection to the input of a signal  
processor.The signal is derived after the mic preamp and HPF but before the eq  
section. Plugging a 1/4"TRS plug into this jack does not break the signal flow of  
the channel.This output jack is ground-compensated.  
insert return  
The output of a signal processor is fed to this jack. It can accept a bal-  
anced or unbalanced signal and is located pre-eq. Plugging a 1/4"TRS plug into this  
jack breaks the signal flow of the channel.  
balanced line-in jack—Bal Line In  
Line-level signals, balanced or unbalanced, may be brought into the  
input channel through this jack.The LINE switch must be depressed for this jack to  
be active.  
balanced mic-in xlr connector—Bal Mic In  
This balanced female XLR accepts a low-impedance microphone signal, or  
a line-level signal, depending on position of the LINE switch on the front panel.  
see—mono input module, phantom power, line  
p.25  
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stereo input module  
X-VCA owner’s manual  
2
LINE 2  
L
MONO  
R
Ø
+
GAIN  
–
0
3
6
6
10  
LINE 2  
15  
25  
AUX 10  
20  
–
1
2
0
0
+
3
30  
40  
•
6
10  
20  
–
L
+
3
30  
40  
•
6
MONO  
PRE  
10  
–
3
4
R
0
20  
30  
+
3
40  
6
•
•
10  
–
0
20  
+
3
30  
40  
Ø
+
6
PRE  
6
5
-
GAIN  
–
0
12  
20  
–
6
0
+
3
6
3
40  
12  
6
•
7
-
6
–
8
6
10  
0
+
20  
40  
3
6
•
15  
25  
PRE  
6K  
3K  
12K  
1.5  
1K  
HF –  
18K  
20K  
0
+
8
8
15  
2K  
15  
3K  
5K  
1K  
600  
8K  
400  
0
HM–  
8
+
8
15  
15  
500  
150  
1K  
100  
2K  
LM –  
8
0
+
8
15  
15  
60  
400  
40  
800  
0
LF  
–
+
8
8
15  
15  
EQ  
ON  
80  
40  
200  
20  
400  
HPF  
STEREO INPUT  
=
BAL  
-
-
ODD  
L
R
EVEN  
SAFE  
PREVIEW  
MUTE  
PK  
L
R
10  
5
SIG  
M
0
5
-
L
R
BAL ON  
GROUPS  
1
10  
2
3
4
5
6
7
8
15  
20  
30  
40  
50  
SOLO  
VCA  
ASSIGN  
p.26  
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stereo input module  
2
features  
The Stereo Input Module can be configured to accept either a stereo pair of sig-  
nals or a standard mono signal. Unlike the Mono Input module, the Stereo input  
modules do not have mic preamps and their associated features (48V phantom  
power and PAD). Instead, the Stereo Input module accepts line level signals via  
multiple pairs of input connectors - RCA, 1/4"TRS and Female XLR.When config-  
ured as a Stereo Module, the Left and Right signals are kept separate throughout  
the module. Settings in the EQ section apply equally to both L & R signals.  
Input signal switching  
There are six Input connectors on the back of the module - three stereo pairs.  
The primary pair of connectors are Female XLR.This Left / Right pair makes up  
"Balanced Line In 1".The secondary connectors are 1/4" balancedTRS and unbal-  
anced RCA. These connectors make up "Line In 2".TheTRS connectors over-  
ride the RCA connectors.  
Line select - Line 2 switch  
The channel is in LINE 1 MODE.The signals are brought in via the left and  
right line-input XLRs located on the rear panel.  
The channel is in LINE 2 MODE.The signals are brought in via the RCA line  
input connectors which are normalled through the 1/4"TRS line-input jacks.  
Insertion of a plug into the 1/4" jack disconnects it's associate RCA jack.  
left and right mono-switches  
These switches provide several options for configuring the stereo line-input mod-  
ule as a mono line-input module.  
left  
right  
Signals brought into the left and right inputs are treated as stereo throughout the  
module.  
left  
right  
Signals brought into the left and right inputs are summed together immediately  
before the GAIN control.The summed signal is treated as mono throughout the  
rest of the module.  
left  
right  
The signal fed to the left input is treated as a mono signal throughout the module.  
No signal from the right input is used.  
left  
right  
The signal fed to the right input is treated as a mono signal throughout the mod-  
ule. No signal from the left input is used.  
p.27  
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X-VCA owner’s manual  
stereo input module  
2
LINE 2  
L
MONO  
R
Ø
+
GAIN  
–
0
3
6
6
10  
LINE 2  
15  
25  
AUX 10  
20  
–
1
2
0
0
+
3
30  
40  
•
6
10  
20  
–
L
+
3
30  
40  
•
6
MONO  
PRE  
10  
–
3
4
R
0
20  
30  
+
3
40  
6
•
•
10  
–
0
20  
+
3
30  
40  
Ø
+
6
PRE  
6
5
-
GAIN  
–
0
12  
20  
–
6
0
+
3
6
3
40  
12  
6
•
7
-
6
–
8
6
10  
0
+
20  
40  
3
6
•
15  
25  
PRE  
6K  
3K  
12K  
1.5  
1K  
HF –  
18K  
20K  
0
+
8
8
15  
2K  
15  
3K  
5K  
1K  
600  
8K  
400  
0
HM–  
8
+
8
15  
15  
500  
150  
1K  
100  
2K  
LM –  
8
0
+
8
15  
15  
60  
400  
40  
800  
0
LF  
–
+
8
8
15  
15  
EQ  
ON  
80  
40  
200  
20  
400  
HPF  
STEREO INPUT  
=
BAL  
-
-
ODD  
L
R
EVEN  
SAFE  
PREVIEW  
MUTE  
PK  
L
R
10  
5
SIG  
M
0
5
-
L
R
BAL ON  
GROUPS  
1
10  
2
3
4
5
6
7
8
15  
20  
30  
40  
50  
SOLO  
VCA  
ASSIGN  
p.28  
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stereo input module  
2
features  
polarity reverse—ø  
This switch inverts the polarity of the right input signal in relation to the left input  
signal. see—mono input module for more info on polarity reverse  
Polarity of the right input signal is inverted.  
Polarity of the right input signal is not inverted.  
input gain—GAIN  
This control adjust the gain of the input preamp(s).  
Both left and right input signals are affected by this control.  
p.29  
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stereo input module  
X-VCA owner’s manual  
2
AUX 10  
20  
–
1
2
0
0
LINE 2  
+
3
L
MONO  
30  
R
Ø
+
40  
GAIN  
–
0
6
3
•
6
6
10  
10  
20  
–
15  
25  
AUX 10  
20  
–
1
2
0
0
+
3
+
3
30  
40  
•
6
10  
20  
–
30  
+
3
30  
40  
•
40  
6
6
•
PRE  
10  
–
3
4
0
20  
30  
+
3
40  
PRE  
6
•
•
10  
–
0
20  
+
3
30  
40  
10  
–
3
4
6
0
0
20  
30  
PRE  
6
+
3
5
-
12  
20  
–
6
0
+
3
40  
12  
6
•
7
-
6
40  
–
8
0
+
6
•
•
20  
40  
3
6
10  
•
–
PRE  
20  
+
3
6K  
3K  
12K  
1.5  
1K  
HF –  
18K  
20K  
30  
40  
0
+
8
8
6
15  
2K  
15  
3K  
5K  
1K  
600  
PRE  
8K  
400  
0
HM–  
8
+
5
-
8
6
15  
15  
–
12  
6
500  
150  
1K  
0
+
100  
2K  
LM –  
8
0
20  
+
8
3
15  
15  
40  
12  
60  
400  
6
•
7
-
6
40  
800  
0
LF  
–
+
–
8
8
8
0
15  
15  
+
EQ  
ON  
20  
40  
3
80  
40  
200  
20  
400  
HPF  
6
•
STEREO INPUT  
=
BAL  
PRE  
-
-
ODD  
L
R
EVEN  
SAFE  
PREVIEW  
MUTE  
PK  
L
R
10  
5
SIG  
M
0
5
-
L
R
BAL ON  
GROUPS  
1
10  
2
3
4
5
6
7
8
15  
20  
30  
40  
50  
SOLO  
VCA  
ASSIGN  
p.30  
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stereo input module  
2
aux send features  
Refer to the Mono Input Module for basic information on the Aux sends.What's  
covered here is information that is specific to the Stereo Input module.  
As we already covered on the Mono Input module, each of the odd/even pairs  
can be globally configured to operate as level / level (for normal mono operation)  
or level / pan (for stereo operation).The global configuring is done in the Aux  
masters which are located on the Group modules.  
Stereo - Being that this module accepts stereo signals, the level / pan, or stereo  
mode is true stereo.This means that when you 1) bring a stereo pair of signals  
into the module, and 2) globally assign a pair of auxes for stereo operation, your  
left signal will go onto the odd bus and the right signal will go onto the even bus.  
In this mode, the odd numbered pot is your "balance" control and the even num-  
bered pot is your "level" control.This is ideal for routing stereo feeds such as  
effects returns and two-track playback onto the auxes.  
Mono -When a pair of auxes is not globally assigned for "level pan" operation  
(standard level / level), the incoming stereo signal is summed to mono before it  
gets to the pair of aux sends.  
If a Stereo Input module is configured as a Mono Input via the Left and Right -  
Mono switches, the auxes function just as they do on a Mono Input module. See  
Mono Input module for more information.  
Eight auxiliary sends are available for creating individual output mixes. These can  
be used to drive effects processors, provide monitor mixes, or create broadcast  
or alternate sound reinforcement mixes, or other special requirements. Each pair  
may be selected from within the master section for mono or stereo operation.  
aux sends 1-2, 3-4, 5-6, 7-8  
See explanation of Aux sends - Stereo & Mono (above).All four pairs of Aux  
sends function the same way. Like the Mono Input module, Auxes 1/2 and 3/4  
are configured as individual pots and Auxes 5/6 and 7/8 are configured as dual  
concentric pots.  
Aux 1/2, 3/4 and 5-8 PRE switches  
AUX SENDS are post-insert, post-eq, post-mute, post-fader  
AUX SENDS are post-insert, post-eq, post-mute, pre-fader  
p.31  
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X-VCA owner’s manual  
stereo input module  
2
6K  
3K  
12K  
LINE 2  
L
MONO  
1.5  
R
18K  
Ø
+
1K  
20K  
GAIN  
–
0
3
6
6
10  
0
HF –  
15  
25  
AUX 10  
20  
–
1
2
+
0
0
+
3
30  
40  
•
6
8
8
10  
20  
–
+
3
30  
40  
•
6
15  
2K  
15  
3K  
PRE  
10  
–
3
4
0
20  
30  
+
3
40  
6
•
•
10  
–
1K  
0
20  
+
3
30  
40  
6
5K  
600  
PRE  
6
5
-
12  
20  
–
6
0
8K  
+
400  
+
3
40  
12  
6
•
7
-
6
0
HM–  
–
8
0
+
20  
40  
3
6
•
8
8
PRE  
6K  
3K  
12K  
1.5  
1K  
HF –  
18K  
20K  
15  
15  
0
+
500  
8
8
15  
2K  
15  
150  
3K  
5K  
1K  
1K  
600  
8K  
400  
0
HM–  
8
+
8
15  
15  
100  
2K  
500  
150  
1K  
0
LM –  
100  
2K  
+
LM –  
8
0
+
8
8
8
15  
15  
60  
400  
15  
15  
40  
800  
0
LF  
–
+
8
8
15  
15  
60  
400  
EQ  
ON  
80  
40  
200  
20  
400  
HPF  
800  
40  
STEREO INPUT  
0
LF  
=
BAL  
–
+
-
-
ODD  
L
R
EVEN  
SAFE  
PREVIEW  
8
8
MUTE  
15  
15  
PK  
L
EQ  
ON  
R
10  
5
SIG  
M
0
5
-
L
R
BAL ON  
80  
40  
200  
GROUPS  
1
10  
2
3
4
5
6
7
8
15  
20  
20  
400  
30  
40  
50  
HPF  
SOLO  
VCA  
ASSIGN  
p.32  
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stereo input module  
2
EQ features  
The X-VCA Stereo Input module offers four bands of EQ - High, High mid, Low  
mid and Low.The High and Low are shelving type EQ and the High mid and Low  
mid have a fixed (non-adjustable) Q of 1. Although the left and right signals are  
processed separately, the paramaters are set in tandem by common front panel  
controls.  
high frequency—HF  
Frequency Continuously sweepable between 1kHz and 20kHz  
Boost / Cut 15dB boost and cut.  
high mid—HM  
Frequency Continuously sweepable between 400 Hz and 8 kHz.  
Boost / Cut 15dB boost and cut.  
Low mid—LM  
Frequency Continuously sweepable between 100 Hz and 2 kHz.  
Boost / Cut 15dB boost and cut.  
Low frequency—LF  
Frequency Continuously sweepable between 40 Hz and 800Hz.  
Boost / Cut 15dB boost and cut.  
eq on  
Equalizer is on. This switch is used to activate the EQ section and can be  
used to make A/B comparisons between "flat" and eq'd signals.  
high-pass filter—HPF  
Proper use of the high-pass filter reduces or eliminates unwanted low frequencies  
without substantially affecting the program material. Quite often such unwanted  
low frequencies are included with in-coming mic- or line-input signals. For exam-  
ple, stage rumble or wind can be picked up through vocal mics.The slope of the  
high-pass filter is 12dB per octave.  
HPF—High pass filter  
When the high-pass filter is on, this control selects a frequency between  
20Hz and 400Hz as the point where attenuation begins.  
High-pass filter is on.  
p.33  
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X-VCA owner’s manual  
stereo input module  
2
STEREO INPUT  
LINE 2  
L
MONO  
=
BAL  
R
Ø
GAIN  
–
+
0
3
6
6
10  
15  
25  
AUX 10  
20  
–
1
2
0
0
+
3
-
-
ODD  
L
R
EVEN  
30  
40  
•
6
10  
20  
–
SAFE  
PREVIEW  
+
3
30  
40  
•
6
PRE  
10  
–
3
4
0
20  
30  
+
3
MUTE  
40  
6
•
•
10  
–
0
20  
+
3
30  
40  
6
PRE  
6
5
-
12  
20  
–
6
0
+
3
40  
12  
6
•
7
-
6
–
8
0
+
20  
40  
3
PK  
6
•
PRE  
L
6K  
3K  
12K  
1.5  
1K  
HF –  
18K  
20K  
0
R
10  
5
+
8
8
SIG  
15  
2K  
15  
3K  
5K  
1K  
600  
8K  
400  
0
HM–  
8
+
8
15  
15  
M
500  
150  
1K  
0
5
100  
2K  
LM –  
8
0
-
L R  
+
8
15  
15  
BAL ON  
60  
400  
40  
800  
0
LF  
–
+
GROUPS  
1
8
8
15  
15  
EQ  
ON  
80  
40  
200  
10  
15  
2
3
20  
400  
HPF  
STEREO INPUT  
=
BAL  
-
-
ODD  
L
R
EVEN  
SAFE  
PREVIEW  
MUTE  
PK  
L
R
10  
5
SIG  
M
0
5
-
L
R
BAL ON  
GROUPS  
1
10  
2
3
4
5
6
7
8
15  
20  
30  
40  
50  
SOLO  
VCA  
ASSIGN  
p.34  
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stereo input module  
2
metering features  
Balance control  
See description of Bus Assignment features later in this section  
safe preview  
LED  
Safe Preview LED  
See LOCAL MICROPROCESSOR CONTROL section  
mute  
Mute switch  
See LOCAL MICROPROCESSOR CONTROL section  
write-in label  
This label may be written on with a grease-marker, or dry-erase pen and later  
wiped clean. Masking tape may also be placed on this surface, if desired. If you  
write on it with a "Sharpie", you may have trouble getting the writing off. If this is  
the case, your best bet is to wipe the label off with isopropyl (rubbing) alcohol.  
Left and Right signal LED indicators  
Both Left and Right inputs each have their own Peak and Signal present LED's.  
peak indicator - PK  
LED  
The input signal is monitored at the mic preamp, the EQ stage and the fader  
stage. Overloads at any of these stages will cause the red peak-LED to light.  
signal present indicator—SIG  
LED  
This green-LED varies in brightness in response to signal levels between -40  
dB and -6 dB.  
p.35  
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X-VCA owner’s manual  
stereo input module  
2
STEREO INPUT  
LINE 2  
L
MONO  
=
BAL  
R
Ø
GAIN  
–
+
0
3
6
6
10  
15  
25  
AUX 10  
20  
–
1
2
0
0
+
3
-
-
ODD  
L
R
EVEN  
30  
40  
•
6
10  
20  
–
SAFE  
PREVIEW  
+
3
30  
40  
•
6
PRE  
10  
–
3
4
0
20  
30  
+
3
MUTE  
40  
6
•
•
10  
–
0
20  
+
3
30  
40  
6
PRE  
6
5
-
12  
20  
–
6
0
+
3
40  
12  
6
•
7
-
6
–
8
0
+
20  
40  
3
PK  
6
•
PRE  
L
6K  
3K  
12K  
1.5  
1K  
HF –  
18K  
20K  
0
R
10  
5
+
8
8
SIG  
15  
2K  
15  
3K  
5K  
1K  
600  
8K  
400  
0
HM–  
8
+
8
15  
15  
M
500  
150  
1K  
0
5
100  
2K  
LM –  
8
0
-
L R  
+
8
15  
15  
BAL ON  
60  
400  
40  
800  
0
LF  
–
+
GROUPS  
1
8
8
15  
15  
EQ  
ON  
80  
40  
200  
10  
2
3
4
5
6
7
8
20  
400  
HPF  
STEREO INPUT  
=
BAL  
15  
20  
-
-
ODD  
L
R
EVEN  
SAFE  
PREVIEW  
MUTE  
PK  
L
30  
R
10  
5
SIG  
M
40  
50  
0
5
-
L
R
BAL ON  
GROUPS  
1
10  
2
3
4
5
6
7
8
15  
20  
30  
40  
50  
SOLO  
VCA  
ASSIGN  
p.36  
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stereo input module  
2
Bus assignment features  
Balance control  
The Balance control adjusts the Stereo balance for the Left/Right assignment  
and Group assignment sections when the BAL ON button is depressed  
balance on—groups—BAL ON  
The left and right signals are summed as mono before being routed to the L-  
R and Group assignments.  
The left and right signals are routed to L-R and Group assignment section in  
odd/even pairs. GROUP assignment switches 1, 3, 5 and 7 carry the left input-signal  
and GROUP assignment switches 2, 4, 6 and 8 carry the right input-signal.The pro-  
portion of left vs. right can be adjusted by the BALANCE control.  
group 1–8 assignment  
The input channel's post-fader signal is assigned to the corresponding GROUP  
bus(es). see—balance on—groups  
input fader  
The input fader is the primary level control for signals being sent to any of the  
consoles mix buses.The only signals not affected are AUX sends selected to be  
pre-fader. The fader offers greater than 80db of attenuation and up to 10db of  
boost. Normal operation is between -10 and 0.  
solo  
Pressing this switch will include (illuminated) or exclude (not-illuminated) the  
input channel from the consoles SOLO system.The channel is Solo'd in stereo.  
see—master module, solo control system  
p.37  
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X-VCA owner’s manual  
stereo input module  
2
PK  
LINE 2  
L
L
MONO  
R
R
10  
5
Ø
+
GAIN  
–
0
3
6
SIG  
6
10  
15  
25  
AUX 10  
20  
–
1
2
0
0
+
3
30  
40  
•
6
10  
20  
–
+
3
M
-
30  
40  
•
6
PRE  
10  
0
5
–
3
4
0
20  
30  
+
3
L R  
40  
6
•
•
10  
–
BAL ON  
0
20  
+
3
30  
40  
6
PRE  
6
5
-
GROUPS  
1
12  
20  
–
6
0
+
3
40  
12  
6
•
7
-
6
–
8
0
+
20  
40  
3
10  
6
•
2
3
4
5
6
7
8
PRE  
6K  
3K  
12K  
1.5  
1K  
HF –  
18K  
20K  
15  
20  
0
+
8
8
15  
2K  
15  
3K  
5K  
1K  
600  
8K  
400  
0
HM–  
8
+
8
15  
15  
500  
30  
150  
1K  
100  
2K  
LM –  
8
0
+
40  
50  
8
15  
15  
60  
400  
40  
800  
0
LF  
–
+
8
8
15  
15  
EQ  
ON  
80  
40  
200  
20  
400  
HPF  
SOLO  
STEREO INPUT  
VCA  
=
BAL  
ASSIGN  
-
-
ODD  
L
R
EVEN  
SAFE  
PREVIEW  
MUTE  
PK  
L
R
10  
5
SIG  
M
0
5
-
L
R
BAL ON  
GROUPS  
1
10  
2
3
4
5
6
7
8
15  
20  
30  
40  
50  
SOLO  
VCA  
ASSIGN  
p.38  
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stereo input module  
2
features  
input fader  
The input fader is the primary level control for signals being sent to any of the  
consoles mix buses.The signals affected are the AUX sends selected to be pre-  
fader.The fader offers greater than 80dB of attenuation and up to 10dB of boost .  
Normal operation is between -10 and 0.The fader itself is a 100mm 10K linear  
taper slide potentiometer. It controls the voltage to the channel'sVCA. No audio  
passes through the fader.  
solo switch  
Pressing this momentary switch will include (illuminate) or exclude (not-illu-  
minated) the channel from the consoles solo system.  
See SOLO FEATURES section.  
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X-VCA owner’s manual  
stereo input module  
2
Line In 2  
Line In 2  
Line In 2  
Line In 2  
L
L
L
L
R
R
R
R
Bal Line In 2 Bal Line In 2 Bal Line In 2 Bal Line In 2  
L
L
L
L
R
R
R
R
Bal Line In 1 Bal Line In 1 Bal Line In 1 Bal Line In 1  
L
L
L
L
R
R
R
R
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stereo input module  
2
rear panel features  
The stereo line-input module provides connectors for three stereo line-level sig-  
nals. see—line 2 switch.  
balanced left and right line-in XLR connectors  
These two jacks accept balanced or unbalanced +4dB line level sig-  
nals.The LINE 2 switch on front-panel must be disengaged for these connectors to  
be active.  
line-input left and right 1/4" TRS jacks  
These two jacks accept balanced or unbalanced line level  
signals.The LINE 2 switch on front panel must be engaged for these jacks to be  
active.  
line-input left and right RCA connectors  
These two jacks accept unbalanced line-level signals.They are active when the LINE  
2 switch on front-panel is engaged and nothing is plugged into the corresponding  
left or right 1/4"TRS jack(s).  
p.41  
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X-VCA owner’s manual  
group module  
3
module  
panel  
block diagram  
–
2
LEV  
1
2
AUX  
1
STEREO PAIR  
INPUT SENDS  
PAN  
SAFE  
PREVIEW  
SAFE  
PREVIEW  
AUX  
1
AUX  
2
MUTE  
MUTE  
OUTPUT  
OUTPUT  
10  
15  
–
10  
15  
–
LEV  
LEV  
0
0
+
+
20  
5
20  
5
40  
•
40  
•
10  
10  
TALK  
TALK  
TO  
TO  
–
LEV  
1
2
AUX 1 2  
SOLO  
SOLO  
STEREO PAIR  
INPUT SENDS  
PAN  
SAFE  
PREVIEW  
SAFE  
MATRIX  
MATRIX  
SENDS10  
–
SENDS 10  
20  
–
1
2
3
4
1
2
3
4
0
0
0
0
0
0
0
0
PREVIEW  
20  
+
3
+
3
C A E C A R D O I N T E R F O U P M I C O T R F R G A P R  
30  
30  
40  
•
40  
•
6
6
AUX  
AUX  
10  
20  
–
10  
20  
–
+
3
+
3
1
2
30  
30  
40  
•
40  
•
6
6
MUTE  
MUTE  
10  
20  
–
10  
20  
–
+
3
+
3
OUTPUT  
OUTPUT  
30  
30  
10  
10  
15  
–
–
40  
•
40  
•
LEV  
LEV  
6
6
15  
20  
40  
0
0
10  
20  
–
10  
20  
–
+
+
5
+
3
+
3
30  
30  
5
20  
40  
•
40  
•
6
6
MTX SENDS  
POST GRP  
MTX SENDS  
POST GRP  
40  
1
2
10  
10  
THR  
THR  
•
•
:
:
2
1
2
1
GATE  
GATE  
30  
30  
40  
50  
25  
40  
50  
25  
RATIO  
RATIO  
TALK  
TALK  
60  
60  
TO  
TO  
–
–
20  
20  
:
1
:
:
1
:
1 1  
5
1
1
5
6
6
GAIN  
(DB)  
GAIN  
(DB)  
3
12  
3
12  
2
16  
2
16  
0
20  
4
0
20  
4
SOLO  
SOLO  
RATIO  
(N:1)  
10  
RATIO  
(N:1)  
10  
2
2
C
C
O
M
P
O
M
P
20  
20  
1
1
15  
THR  
(DBU)  
15  
THR  
(DBU)  
–
–
25  
25  
0
0
+
+
10  
10  
35  
35  
40  
15  
40  
15  
STEREO  
LINK  
–
2
COMP•GATE  
1
GROUP  
PAN  
GROUP  
PAN  
=
=
L
R
L
R
SAFE  
PREVIEW  
SAFE  
PREVIEW  
MUTE  
MUTE  
10  
5
10  
5
THR  
ON  
THR  
ON  
GATE  
GATE  
1
2
3
5
7
1
2
3
5
7
0
5
0
5
GRP  
ATT  
(DB)  
GRP  
ATT  
(DB)  
9
9
12  
15  
18  
21  
12  
15  
18  
21  
COMP  
SOFT  
KNEE  
COMP  
SOFT  
KNEE  
10  
10  
15  
20  
15  
20  
VOX  
AUTO  
PERC  
VOX  
AUTO  
PERC  
THR  
ON  
THR  
ON  
GRP DYN  
GROUP  
ASSIGN  
GRP DYN  
GROUP  
ASSIGN  
30  
30  
40  
50  
40  
50  
M
M
-
-
R
L
R
L
GROUP  
INSERT  
GROUP  
INSERT  
ON  
ON  
PK  
PK  
GRP  
1
GRP  
2
SOLO  
VCA  
ASSIGN  
SIG  
SIG  
SOLO  
VCA  
ASSIGN  
MUTE  
MUTE  
10  
5
10  
5
VCA  
1
VCA  
2
UNITY  
0
5
UNITY  
0
5
10  
15  
10  
15  
20  
30  
20  
30  
EDIT  
VCA  
ASSIGN  
EDIT  
VCA  
ASSIGN  
1
2
40  
50  
40  
50  
VCA 1  
SOLO  
ASSIGN  
VCA 2  
SOLO  
ASSIGN  
p.42  
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group module  
3
group module features  
The Group modules are physically configured in pairs, four pairs making up  
the eight Groups. Each of the eight Group modules offer identical functions  
for the eight associated Aux Masters,Audio Groups, andVCA Groups.  
Each group module includes the following sections:  
*Aux output control  
*Matrix send  
*Groups dynamics control with gain reduction meter  
*Audio group with 100mm fader andVCA control  
*VCA master group with 100mm fader  
aux output control  
AUX STEREO PAIR switch Each odd / even pair of Aux masters has an  
Aux Stereo Pair switch for globally configuring the associated auxes for Level  
/ Level or Level / Pan operation  
The associated odd / even pair of Auxes function as individual, discrete  
mono aux sends.  
The associated odd / even pair of Auxes function as a stereo pair.The  
odd numbered Aux acts as a Level control for the stereo pair and the even  
numbered Aux acts as a pan control  
mute  
Mute switch  
See LOCAL MICROPROCESSOR CONTROL section  
Aux master output level (1 - 8)  
The AUX MASTER output level controls set the levels that appear at the  
corresponding AUX output connectors on the rear-panel.  
Talk to (1 - 8)  
Adds theTALKBACK system output to the associated AUX output.The  
level of theTALKBACK signal is set by theTALKBACK level control in the MAS-  
TER section.  
solo switch  
Pressing this momentary switch will include (illuminate) or exclude (not-illu-  
minated) the channel from the consoles solo system.  
See SOLO FEATURES section.  
write-in label  
This label may be written on with a grease-marker, or dry-erase pen and later  
wiped clean. Masking tape may also be placed on this surface, if desired. If you  
write on it with a "Sharpie", you may have trouble getting the writing off. If this is  
the case, your best bet is to wipe the label off with isopropyl (rubbing) alcohol.  
p.43  
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X-VCA owner’s manual  
group module  
3
module  
panel  
block diagram  
MATRIX  
SENDS10  
MATRIX  
SENDS 10  
–
–
1
2
3
4
1
2
3
4
0
0
0
0
0
0
0
0
20  
20  
+
3
+
3
–
2
LEV  
1
2
AUX  
1
STEREO PAIR  
INPUT SENDS  
PAN  
30  
30  
SAFE  
PREVIEW  
SAFE  
PREVIEW  
40  
20  
40  
AUX  
1
AUX  
2
6
6
•
•
•
•
•
MUTE  
MUTE  
10  
10  
10  
10  
20  
–
–
OUTPUT  
LEV  
OUTPUT  
–
LEV  
10  
15  
–
10  
15  
0
0
+
+
+
3
+
3
20  
5
20  
5
40  
•
40  
•
10  
10  
30  
30  
TALK  
TO  
TALK  
TO  
40  
40  
6
6
•
SOLO  
SOLO  
10  
20  
–
–
20  
+
3
+
3
MATRIX  
MATRIX  
30  
30  
SENDS10  
–
SENDS 10  
20  
–
1
2
3
4
1
2
3
4
0
0
0
0
0
0
0
0
20  
+
3
+
3
40  
40  
30  
30  
6
6
40  
•
40  
•
•
6
6
10  
20  
–
10  
20  
–
10  
20  
–
–
+
3
+
3
30  
30  
20  
+
3
+
3
40  
•
40  
•
6
6
10  
20  
–
10  
20  
–
30  
40  
30  
+
3
+
3
30  
30  
40  
•
40  
•
40  
6
6
6
6
•
10  
20  
–
10  
20  
–
+
+
3
3
30  
30  
MTX SENDS  
POST GRP 1  
MTX SENDS  
POST GRP 2  
40  
•
40  
•
6
6
MTX SENDS  
POST GRP  
MTX SENDS  
POST GRP  
1
2
THR  
THR  
:
:
2
1
2
1
THR  
THR  
GATE  
GATE  
:
:
1 2  
1 2  
GATE  
GATE  
30  
30  
40  
50  
25  
40  
50  
25  
RATIO  
30  
30  
RATIO  
40  
40  
25  
25  
60  
60  
–
–
20  
20  
:
1
:
:
1
:
1 1  
5
1
1
5
6
6
GAIN  
(DB)  
GAIN  
(DB)  
3
12  
3
12  
2
16  
2
16  
0
20  
4
0
20  
4
RATIO  
(N:1)  
10  
RATIO  
(N:1)  
10  
2
2
C
C
O
M
P
O
M
P
20  
20  
1
1
15  
THR  
(DBU)  
15  
THR  
(DBU)  
–
–
25  
25  
0
0
+
+
10  
10  
35  
35  
40  
15  
40  
15  
STEREO  
LINK  
–
2
COMP•GATE  
1
GROUP  
PAN  
GROUP  
PAN  
=
=
L
R
L
R
SAFE  
PREVIEW  
SAFE  
PREVIEW  
MUTE  
MUTE  
10  
5
10  
5
THR  
ON  
THR  
ON  
GATE  
GATE  
1
2
3
5
7
1
2
3
5
7
0
5
0
5
GRP  
ATT  
(DB)  
GRP  
ATT  
(DB)  
9
9
12  
15  
18  
21  
12  
15  
18  
21  
COMP  
SOFT  
KNEE  
COMP  
SOFT  
KNEE  
10  
10  
15  
20  
15  
20  
VOX  
AUTO  
PERC  
VOX  
AUTO  
PERC  
THR  
ON  
THR  
ON  
GRP DYN  
GROUP  
ASSIGN  
GRP DYN  
GROUP  
ASSIGN  
30  
30  
40  
50  
40  
50  
M
M
-
-
R
L
R
L
GROUP  
INSERT  
GROUP  
INSERT  
ON  
ON  
PK  
PK  
GRP  
1
GRP  
2
SOLO  
VCA  
ASSIGN  
SIG  
SIG  
SOLO  
VCA  
ASSIGN  
MUTE  
MUTE  
10  
5
10  
5
VCA  
1
VCA  
2
UNITY  
0
5
UNITY  
0
5
10  
15  
10  
15  
20  
30  
20  
30  
EDIT  
VCA  
ASSIGN  
EDIT  
VCA  
ASSIGN  
1
2
40  
50  
40  
50  
VCA 1  
SOLO  
ASSIGN  
VCA 2  
SOLO  
ASSIGN  
p.44  
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group module  
3
m atrix sends  
The X-VCA includes four MATRIX outputs. Each of these outputs can be made up  
of signals from the eight GROUPS; the left, right and mono buses; and an external  
source. See Master section for more information. For expanded Matrixing capabil-  
ities, a 37 pin d-sub connector is included on the rare panel which contains all or  
the primary outputs. See Group module rear panel description for more informa-  
tion.  
matrix 1–4 levels—M1, M2, M3, M4  
These level controls are used to mix the group's signal into the correspond-  
ing matrix.  
post-group  
The GROUP fader setting has no effect on the group-to-matrix level controls  
1–4.  
The GROUP fader is introduced into the signal path and will control the signal  
level.When the group is muted, the group's signals to matrix 1-4 are muted as  
well.  
p.45  
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X-VCA owner’s manual  
group module  
module  
panel  
block diagram  
THR  
THR  
:
:
1 2  
1 2  
GATE  
GATE  
30  
30  
40  
50  
40  
50  
25  
25  
RATIO  
RATIO  
3
–
2
LEV  
1
2
AUX  
1
STEREO PAIR  
INPUT SENDS  
60  
60  
PAN  
SAFE  
SAFE  
PREVIEW  
PREVIEW  
–
–
20  
20  
:
:
:
:
1 5  
1 1  
1 5  
1 1  
AUX  
1
AUX  
2
6
6
GAIN  
GAIN  
MUTE  
MUTE  
3
12  
3
12  
(
)
(
)
DB  
DB  
OUTPUT  
OUTPUT  
10  
15  
–
10  
15  
–
LEV  
LEV  
0
0
+
+
5
2
16  
2
16  
20  
5
20  
40  
•
40  
•
10  
10  
TALK  
TALK  
TO  
0
20  
0
20  
TO  
RATIO  
RATIO  
SOLO  
SOLO  
4
4
(
:
)
(
:
)
N 1  
N 1  
2
2
C
O
C
O
10  
20  
10  
20  
M
P
M
P
MATRIX  
MATRIX  
SENDS10  
–
SENDS 10  
20  
–
1
2
3
4
1
2
3
4
0
0
0
0
0
0
0
0
1
1
20  
+
3
+
3
30  
30  
40  
•
40  
•
15  
THR  
15  
THR  
6
6
–
–
(
)
(
)
DBU  
DBU  
10  
20  
–
10  
20  
–
25  
25  
0
0
+
3
+
3
+
10  
+
10  
30  
30  
40  
•
40  
•
6
6
35  
35  
10  
20  
–
10  
20  
–
+
3
+
3
C A E C A R D O I N T E R F O U P M I C O T R F R G A P R  
40  
15  
40  
15  
30  
30  
40  
•
40  
•
6
6
10  
20  
–
10  
20  
–
STEREO  
LINK  
+
+
–
COMP•GATE  
1 2  
3
3
30  
30  
40  
•
40  
•
6
6
MTX SENDS  
POST GRP  
MTX SENDS  
POST GRP  
1
2
THR  
THR  
:
:
2
1
2
1
GATE  
GATE  
30  
30  
40  
50  
25  
40  
50  
25  
RATIO  
RATIO  
60  
60  
–
–
20  
20  
:
1
:
:
1
:
1 1  
5
1
1
5
6
6
GAIN  
(DB)  
GAIN  
(DB)  
3
12  
3
12  
2
16  
2
16  
0
20  
4
0
20  
4
RATIO  
(N:1)  
10  
RATIO  
(N:1)  
10  
2
2
C
C
O
M
P
O
M
P
20  
20  
1
1
15  
THR  
(DBU)  
15  
THR  
(DBU)  
–
–
25  
25  
0
0
+
+
10  
10  
35  
35  
40  
15  
40  
15  
STEREO  
LINK  
–
2
COMP•GATE  
1
GROUP  
PAN  
GROUP  
PAN  
=
=
L
R
L
R
SAFE  
PREVIEW  
SAFE  
PREVIEW  
MUTE  
MUTE  
10  
5
10  
5
THR  
ON  
THR  
ON  
GATE  
GATE  
1
2
3
5
7
1
2
3
5
7
0
5
0
5
GRP  
ATT  
(DB)  
GRP  
ATT  
(DB)  
9
9
12  
15  
18  
21  
12  
15  
18  
21  
COMP  
SOFT  
KNEE  
COMP  
SOFT  
KNEE  
10  
10  
15  
20  
15  
20  
VOX  
AUTO  
PERC  
VOX  
AUTO  
PERC  
THR  
ON  
THR  
ON  
GRP DYN  
GROUP  
ASSIGN  
GRP DYN  
GROUP  
ASSIGN  
30  
30  
40  
50  
40  
50  
M
M
-
-
R
L
R
L
GROUP  
INSERT  
GROUP  
INSERT  
ON  
ON  
PK  
PK  
GRP  
1
GRP  
2
SOLO  
VCA  
ASSIGN  
SIG  
SIG  
SOLO  
VCA  
ASSIGN  
MUTE  
MUTE  
10  
5
10  
5
VCA  
1
VCA  
2
UNITY  
0
5
UNITY  
0
5
10  
15  
10  
15  
20  
30  
20  
30  
EDIT  
VCA  
ASSIGN  
EDIT  
VCA  
ASSIGN  
1
2
40  
50  
40  
50  
VCA 1  
SOLO  
ASSIGN  
VCA 2  
SOLO  
ASSIGN  
p.46  
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group module  
3
group dynamics section  
The X-VCA Audio Group and Master modules include a number of features  
for flexible dynamic control of signal levels. On Group modules, the com-  
pressor and gate functions may be engaged separately or simultaneously. For  
a comprehensive discussion of these features, see Section on Dynamics  
Control Operation.  
NOTE: This dynamics  
section is intended for  
use by an experienced oper-  
ator. It's best to be familiar  
with compressors and lim-  
iters before using them in  
critical applications!  
+
gate  
The gate is used to attenuate or silence the signal when it's level falls below  
a selected point (threshold).  
THRESHO LD (THR) control (center knob of dual concentric control)  
Adjusts the point at which any DECREASE in input signal level will  
cause a further reduction in output level (gain) as determined by the ratio  
control setting. Threshold may be set between -20db and -60db (and  
below).  
RATIO control (outside of dual concentric control)  
Adjusts the proportion of output signal in relation to input signal  
when operating BELOW the set gate threshold level. Ratio may be adjusted  
from 1:1 to above 1:5. Gating demonstrates "soft knee" characteristics.  
com pressor  
The compressor is used to reduce a signals dynamic range by the selected  
ratio. It can also be configured to limit the signals output level.  
GAIN (m ake up) control  
Adjusts to make up for apparent gain loss due to compression of input  
signals. In the Solo Pre position (default), the output of the dynamics sec-  
tion can be viewed before theVCA control system fader. The gain control  
should be adjusted to show near 0 reference level when normal signals are  
present. The GAIN control has a range of 0db to +20db.  
RATIO control  
Adjusts the proportion of output signal in relation to input signal above  
the set threshold level. The ratio of input to output signal may be adjusted  
from 1:1 to greater than 20:1 (hard limiting).  
THRESHO LD (THR) control  
Adjusts point at which any increase in input signal to the  
compressor/limiter section will cause a reduction in output level at a rate  
determined by the ratio control setting. The threshold may be set between  
-45db and +15db.  
CO MP-GATE stereo link  
Links the odd and even GROUP's dynamics sections for stereo opera-  
tion. The GROUP with the highest amount of auto-attenuation controls the  
dynamics sections for both groups in the odd/even pair.  
p.47  
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X-VCA owner’s manual  
group module  
3
module  
panel  
block diagram  
GROUP  
PAN  
GROUP  
PAN  
=
=
3
–
2
LEV  
1
2
AUX  
1
STEREO PAIR  
INPUT SENDS  
L
R
L
R
PAN  
SAFE  
SAFE  
PREVIEW  
PREVIEW  
SAFE  
SAFE  
AUX  
1
AUX  
2
PREVIEW  
PREVIEW  
MUTE  
MUTE  
OUTPUT  
OUTPUT  
10  
15  
–
10  
15  
–
LEV  
LEV  
0
0
+
+
20  
5
20  
5
40  
•
40  
•
10  
10  
TALK  
TALK  
TO  
MUTE  
MUTE  
TO  
10  
5
10  
5
SOLO  
SOLO  
THR  
ON  
THR  
ON  
MATRIX  
MATRIX  
SENDS10  
–
SENDS 10  
20  
–
1
2
3
4
1
2
3
4
0
0
0
0
0
0
0
0
GATE  
GATE  
20  
+
3
+
3
30  
30  
40  
•
40  
•
1
2
3
5
7
1
2
3
5
7
6
6
0
5
0
5
10  
20  
–
10  
20  
–
+
3
+
3
30  
30  
40  
•
40  
•
6
6
GRP  
ATT  
GRP  
ATT  
10  
20  
–
10  
20  
–
+
3
+
3
9
9
C A E C A R D O I N T E R F O U P M I C O T R F R G A P R  
(
)
(
)
DB  
DB  
30  
30  
12  
15  
18  
21  
12  
15  
18  
21  
40  
•
40  
•
6
6
10  
20  
–
10  
20  
–
+
+
3
3
30  
30  
40  
•
40  
•
6
6
MTX SENDS  
POST GRP  
MTX SENDS  
POST GRP  
COMP  
SOFT  
KNEE  
COMP  
SOFT  
KNEE  
1
2
10  
10  
THR  
THR  
:
:
2
1
2
1
GATE  
GATE  
30  
30  
40  
50  
25  
40  
50  
25  
RATIO  
RATIO  
60  
60  
–
–
20  
20  
:
1
:
:
1
:
1 1  
5
1
1
5
6
6
15  
20  
15  
20  
VOX  
AUTO  
PERC  
VOX  
AUTO  
PERC  
GAIN  
(DB)  
GAIN  
(DB)  
3
12  
3
12  
2
16  
2
16  
0
20  
4
0
20  
4
RATIO  
(N:1)  
10  
RATIO  
(N:1)  
10  
2
2
C
C
O
M
P
O
M
P
20  
20  
THR  
ON  
THR  
ON  
1
1
15  
THR  
(DBU)  
15  
THR  
(DBU)  
–
–
25  
25  
0
0
+
+
GRP DYN  
GROUP  
ASSIGN  
GRP DYN  
GROUP  
ASSIGN  
10  
10  
30  
30  
35  
35  
40  
15  
40  
15  
STEREO  
LINK  
–
2
COMP•GATE  
1
40  
50  
40  
50  
GROUP  
PAN  
GROUP  
PAN  
M
M
=
=
L
R
L
R
-
-
L R  
L R  
SAFE  
PREVIEW  
SAFE  
PREVIEW  
GROUP  
GROUP  
INSERT  
INSERT  
MUTE  
MUTE  
10  
5
10  
5
THR  
ON  
THR  
ON  
ON  
ON  
GATE  
GATE  
1
2
3
5
7
1
2
3
5
7
0
5
0
5
PK  
PK  
GRP  
GRP  
GRP  
ATT  
GRP  
ATT  
1
2
9
9
(DB)  
(DB)  
12  
15  
18  
21  
12  
15  
18  
21  
SIG  
SIG  
SOLO  
SOLO  
COMP  
COMP  
10  
10  
SOFT  
KNEE  
SOFT  
KNEE  
VCA  
VCA  
ASSIGN  
ASSIGN  
15  
20  
15  
20  
VOX  
AUTO  
PERC  
VOX  
AUTO  
PERC  
THR  
ON  
THR  
ON  
GRP DYN  
GROUP  
ASSIGN  
GRP DYN  
GROUP  
ASSIGN  
30  
30  
40  
50  
40  
50  
M
M
-
-
R
L
R
L
GROUP  
INSERT  
GROUP  
INSERT  
ON  
ON  
PK  
PK  
GRP  
1
GRP  
2
SOLO  
VCA  
ASSIGN  
SIG  
SIG  
SOLO  
VCA  
ASSIGN  
MUTE  
MUTE  
10  
5
10  
5
VCA  
1
VCA  
2
UNITY  
0
5
UNITY  
0
5
10  
15  
10  
15  
20  
30  
20  
30  
EDIT  
VCA  
ASSIGN  
EDIT  
VCA  
ASSIGN  
1
2
40  
50  
40  
50  
VCA 1  
SOLO  
ASSIGN  
VCA 2  
SOLO  
ASSIGN  
p.48  
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group module  
3
group dynamics section  
Note:The following dynamics controls are located adjacent to the Group fader.  
gate ON (downward expander)  
Activates the gate (downward expander) function.  
gate ON/THR (Threshold) dual color LED  
LED  
Illuminates GREEN when the gate system is active. Illuminates RED when  
the group's signal level reaches the threshold level set by the GATETHR control.  
Note that red threshold indication is functioning at all times, even when gate is  
not active (switched off).  
gain reduction meter (ATT)  
LED  
LED  
LED  
LED  
LED  
LED  
LED  
LED  
LED  
LED  
This ten-segment meter indi-  
cates the overall gain reduction applied to input signals by the dynamics system by  
either the gate function or the compressor function. If both gate and compressor  
functions are switched on, one of the two bi-color LEDs (gate ON/THR or comp  
ON/THR) will illuminate red to show which function is at threshold and causing  
the gain reduction.  
comp SOFT KNEE Switch - Changes initial compression characteristic  
between Hard and Soft Knee.  
Hard Compression - Immediately reduces compressor output signal levels at  
the set compression ratio as soon as compressor input signal reaches the set  
threshold.  
Soft Compression - At threshold, reduces output signal level at a variable  
compression ratio over an increasing input signal level until the set compression  
ratio is achieved.  
comp VOX on Switch  
Activates the compressor/limiter system. Attack and release times are opti-  
mized for vocal applications.  
comp PERC on Switch  
Activates the compressor/limiter system.Attack and release times are opti-  
mized for percussion applications.  
comp AUTO on (both VOX and PERC switches depressed)  
When both theVOX and PERC switches are depressed, the compres-  
sor/limiter system is activated with automatic control of attack and release times  
as determined by signal characteristics.  
comp ON/THR (Threshold) dual color LED  
LED  
Illuminates GREEN when the compressor system is activated by either the  
VOX or PERC switch, or both. Illuminates RED when the channel’s signal level  
reaches the threshold set on the COMPTHR (threshold) control.  
p.49  
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X-VCA owner’s manual  
group module  
3
module  
panel  
block diagram  
GROUP  
PAN  
GROUP  
PAN  
=
=
3
–
2
LEV  
1
2
AUX  
1
STEREO PAIR  
INPUT SENDS  
PAN  
L
R
L
R
SAFE  
SAFE  
PREVIEW  
PREVIEW  
SAFE  
SAFE  
AUX  
1
AUX  
2
PREVIEW  
PREVIEW  
MUTE  
MUTE  
OUTPUT  
OUTPUT  
10  
15  
–
10  
15  
–
LEV  
LEV  
0
0
+
+
20  
5
20  
5
40  
•
40  
•
10  
10  
TALK  
TALK  
TO  
MUTE  
MUTE  
TO  
10  
5
10  
5
SOLO  
SOLO  
THR  
ON  
THR  
ON  
MATRIX  
MATRIX  
SENDS10  
–
SENDS 10  
20  
–
1
2
3
4
1
2
3
4
0
0
0
0
0
0
0
0
20  
+
3
+
3
GATE  
GATE  
30  
30  
40  
•
40  
•
6
6
1
2
3
5
7
1
2
3
5
7
0
5
0
5
10  
20  
–
10  
20  
–
+
3
+
3
30  
30  
C A E F C A R D  
40  
•
40  
•
6
6
GRP  
ATT  
GRP  
ATT  
10  
20  
–
10  
20  
–
+
3
+
3
9
9
30  
30  
(
)
(
)
DB  
DB  
40  
•
40  
•
12  
15  
18  
21  
12  
15  
18  
21  
6
6
10  
20  
–
10  
20  
–
+
+
3
3
30  
30  
40  
•
40  
•
6
6
MTX SENDS  
POST GRP  
MTX SENDS  
POST GRP  
COMP  
SOFT  
KNEE  
COMP  
SOFT  
KNEE  
1
2
THR  
THR  
:
:
2
10  
10  
1
2
1
GATE  
GATE  
30  
30  
40  
50  
25  
40  
50  
25  
RATIO  
RATIO  
60  
60  
–
–
20  
20  
:
1
:
:
1
:
1 1  
5
1
1
5
6
6
GAIN  
(DB)  
GAIN  
(DB)  
15  
20  
15  
20  
VOX  
AUTO  
PERC  
VOX  
AUTO  
PERC  
3
12  
3
12  
2
16  
2
16  
0
20  
4
0
20  
4
RATIO  
(N:1)  
10  
RATIO  
(N:1)  
10  
2
2
C
C
O
M
P
O
M
P
20  
20  
THR  
ON  
THR  
ON  
1
1
15  
THR  
(DBU)  
15  
THR  
(DBU)  
–
–
25  
25  
0
0
+
+
GRP DYN  
GROUP  
ASSIGN  
GRP DYN  
GROUP  
ASSIGN  
10  
10  
35  
35  
30  
30  
40  
15  
40  
15  
STEREO  
LINK  
–
2
COMP•GATE  
1
40  
50  
40  
50  
GROUP  
PAN  
GROUP  
PAN  
=
=
M
M
L
R
L
R
-
-
SAFE  
PREVIEW  
SAFE  
L R  
L R  
PREVIEW  
GROUP  
INSERT  
GROUP  
INSERT  
MUTE  
MUTE  
10  
5
10  
5
THR  
ON  
THR  
ON  
ON  
ON  
GATE  
GATE  
1
2
3
5
7
1
2
3
5
7
0
5
0
5
PK  
PK  
GRP  
GRP  
GRP  
ATT  
GRP  
ATT  
9
9
(DB)  
(DB)  
1
2
12  
15  
18  
21  
12  
15  
18  
21  
SIG  
SIG  
SOLO  
SOLO  
COMP  
COMP  
10  
10  
SOFT  
KNEE  
SOFT  
KNEE  
VCA  
VCA  
ASSIGN  
ASSIGN  
15  
20  
15  
20  
VOX  
AUTO  
PERC  
VOX  
AUTO  
PERC  
THR  
ON  
THR  
ON  
GRP DYN  
GROUP  
ASSIGN  
GRP DYN  
GROUP  
ASSIGN  
30  
30  
40  
50  
40  
50  
M
M
-
-
R
L
R
L
GROUP  
INSERT  
GROUP  
INSERT  
ON  
ON  
PK  
PK  
GRP  
1
GRP  
2
SOLO  
VCA  
ASSIGN  
SIG  
SIG  
SOLO  
VCA  
ASSIGN  
MUTE  
MUTE  
10  
5
10  
5
VCA  
1
VCA  
2
UNITY  
0
5
UNITY  
0
5
10  
15  
10  
15  
20  
30  
20  
30  
EDIT  
VCA  
ASSIGN  
EDIT  
VCA  
ASSIGN  
1
2
40  
50  
40  
50  
VCA 1  
SOLO  
ASSIGN  
VCA 2  
SOLO  
ASSIGN  
p.50  
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group module  
3
audio group control features  
This section provides standard features for the Group bus masters. Signals that are  
assigned to the Audio groups are summed together to make up the audio Groups. A  
full featured dynamics control section (see previous section) can be engaged for pro-  
cessing the summed group signals.These signals can be assigned to the Left, Right and  
Mono buses and appear at the Group output jacks on the rear panel.  
group pan  
The PAN pot is used to position the group signal within the stereo left / right  
field.The signal must be assigned to left and right in order for the PAN control to  
have any effect.  
safe preview  
LED  
Safe Preview LED  
See LOCAL MICROPROCESSOR CONTROL section  
mute  
Mute switch  
See LOCAL MICROPROCESSOR CONTROL section  
audio group fader  
This 100mm fader controls signal levels to the associated audio group outputs as  
well as signals assigned to the left/right and mono (center) mix buses.  
mono assignment switch  
Post fader assignment of signal to the mono mix bus.  
L-R stereo assignment switch  
Post fader/post pan pot assignment of signal to the left and right stereo mix  
buses.  
Group insert O N switch  
The Insert point is located after the group summing amp and before the  
dynamics control system. External signal processors can be inserted into the  
group via 1/4" TRS connectors (send and return) on the rear panel.The  
SEND signal is unbalanced and the RETURN can accept both unbalanced  
and balanced signals.  
Insert is switched OUT.Any signal coming into the Insert RETURN  
jack is ignored.The Insert SEND jack can be used to derive a pre dynamics,  
pre fader output from the group without interrupting the group's normal  
signal flow.  
Insert is switched IN.The Insert RETURN jack is active.A signal  
processor patched to the groups insert is switched into the signal path.  
signal/peak LED  
LED  
This dual color LED responds audio Group's signal level. It illuminates green  
with varying brightness in proportion to the pre-fader audio signal.When the sig-  
nal approaches clipping, either pre or post fader, the LED illuminates red.  
solo switch  
Pressing this momentary switch will include (illuminate) or exclude (not-illu-  
minated) the channel from the consoles solo system.  
See SOLO FEATURES section.  
p.51  
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X-VCA owner’s manual  
group module  
3
module  
panel  
block diagram  
3
–
2
LEV  
1
2
AUX  
1
STEREO PAIR  
INPUT SENDS  
PAN  
SAFE  
SAFE  
PREVIEW  
PREVIEW  
AUX  
1
AUX  
2
MUTE  
MUTE  
OUTPUT  
OUTPUT  
MUTE  
MUTE  
10  
15  
–
10  
15  
–
LEV  
LEV  
10  
5
10  
5
0
0
+
+
20  
5
20  
5
40  
•
40  
•
10  
10  
VCA  
1
VCA  
2
TALK  
TALK  
TO  
TO  
SOLO  
SOLO  
UNITY  
0
5
UNITY  
0
5
MATRIX  
MATRIX  
SENDS10  
–
SENDS 10  
20  
–
1
2
3
4
1
2
3
4
0
0
0
0
0
0
0
0
20  
+
3
+
3
30  
30  
40  
•
40  
•
6
6
10  
20  
–
10  
20  
–
+
3
+
3
30  
30  
40  
•
40  
•
6
6
10  
20  
–
10  
20  
–
+
3
+
3
30  
30  
40  
•
40  
•
6
6
10  
20  
–
10  
20  
–
10  
10  
+
3
+
3
30  
30  
40  
•
40  
•
6
6
MTX SENDS  
POST GRP  
MTX SENDS  
POST GRP  
1
2
THR  
THR  
:
:
2
1
2
1
GATE  
GATE  
15  
20  
15  
20  
30  
30  
40  
50  
25  
40  
50  
25  
RATIO  
RATIO  
60  
:
60  
:
–
–
20  
20  
:
1
:
1
1
5
1
1
5
1
6
6
GAIN  
(DB)  
GAIN  
(DB)  
3
12  
3
12  
2
16  
2
16  
0
20  
4
0
20  
4
RATIO  
(N:1)  
10  
RATIO  
(N:1)  
10  
EDIT  
EDIT  
VCA 2  
ASSIGN  
C E C A R D  
2
2
C
C
30  
30  
O
M
P
O
M
P
VCA 1  
20  
20  
ASSIGN  
1
1
15  
THR  
(DBU)  
15  
THR  
(DBU)  
–
–
25  
25  
0
0
40  
50  
40  
50  
+
10  
+
10  
35  
35  
40  
15  
40  
15  
STEREO  
LINK  
–
2
COMP•GATE  
1
GROUP  
PAN  
GROUP  
PAN  
=
=
L
R
L
R
SAFE  
PREVIEW  
SAFE  
PREVIEW  
MUTE  
MUTE  
10  
5
10  
5
THR  
ON  
THR  
ON  
VCA 1  
VCA 2  
SOLO  
SOLO  
GATE  
GATE  
ASSIGN  
ASSIGN  
1
2
3
5
7
1
2
3
5
7
0
5
0
5
GRP  
ATT  
(DB)  
GRP  
ATT  
(DB)  
9
9
12  
15  
18  
21  
12  
15  
18  
21  
COMP  
SOFT  
KNEE  
COMP  
SOFT  
KNEE  
10  
10  
15  
20  
15  
20  
VOX  
AUTO  
PERC  
VOX  
AUTO  
PERC  
THR  
ON  
THR  
ON  
GRP DYN  
GROUP  
ASSIGN  
GRP DYN  
GROUP  
ASSIGN  
30  
30  
40  
50  
40  
50  
M
M
-
-
R
L
R
L
GROUP  
INSERT  
GROUP  
INSERT  
ON  
ON  
PK  
PK  
GRP  
1
GRP  
2
SOLO  
VCA  
ASSIGN  
SIG  
SIG  
SOLO  
VCA  
ASSIGN  
MUTE  
MUTE  
10  
5
10  
5
VCA  
1
VCA  
2
UNITY  
0
5
UNITY  
0
5
10  
15  
10  
15  
20  
30  
20  
30  
EDIT  
VCA  
ASSIGN  
EDIT  
VCA  
ASSIGN  
1
2
40  
50  
40  
50  
VCA 1  
SOLO  
ASSIGN  
VCA 2  
SOLO  
ASSIGN  
p.52  
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group module  
3
VCA group master control features  
This section controlsVCA levels of any assigned input channels or audio  
groups assigned to theVCA group.VCA control of audio groups is a unique  
feature not offered on most otherVCA consoles. For more information on  
usingVCA control of audio groups, see Section onVCA Group Operation.  
Caution: When assign-  
ing (or un-assigning)  
+
active channels during a live  
performance, care should be  
exercised as a level change  
will occur at any fader posi-  
tion other than UNITY.  
vca group Channel MUTE switch  
This mute switch follows the assignment of the channelsVCA system.  
When activated, it mutes all assigned input and audio group channels except  
when channel or group safe mode is activated. All primary and auxiliary  
outputs will be muted, including pre fader aux sends if internal mute jumper  
is in default pre fader muteYES position.  
100m m VCA control fader  
Controls relative volume levels of all input and audio group channels  
assigned to theVCA group. (No audio passes through this fader.)  
unity LED indicator  
LED  
Illuminates when the fader is at its unity gain position. At unity gain,  
input or audio group channels may be assigned (or removed from assign-  
ment) without a level change.  
VCA Group edit switch  
When selected, this switch allows editing ofVCA assignments for input  
and analog group channels. In this mode, the selectedVCA Group Edit  
switch will illuminate and flash. Only one Edit switch can be selected at a  
time, and selection of theVCA Group Edit Switch will override any SOLO  
switch selected (solo clear). To exitVCA Edit Mode, press the selected (illu-  
minated and flashing) switch to toggle it to the off position.  
Whenever aVCA Group Edit switch is flashing, the SOLO-VCA EDIT  
switches will flash on all input and group channels assigned to thatVCA  
group.  
For a complete discussion ofVCA group editing, see section onVCA Group  
Operation.  
VCA SO LO switch  
When selected, this switch illuminates and activates all input and audio  
group SOLO switches assigned to thatVCA group.All channels are moni-  
tored within the solo system as a related group. TheVCA SOLO system  
also may be used to quickly reviewVCA assignments, though no modifica-  
tion of assignment is permitted.  
p.53  
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X-VCA owner’s manual  
group module  
3
Matrix  
Expansion  
Lamp  
Dim  
Meter Bridge  
x 2  
Matrix 1  
Out  
8
5
7
6
4
3
Group Out  
Group Out  
Group Out  
Group Out  
Group Out  
Group Out  
In  
nsert  
Send  
Insert  
Send  
Insert  
Send  
Insert  
Send  
Insert  
Send  
Insert  
Send  
Insert  
Send  
Insert  
Send  
Return  
Return  
AUX  
Return  
Return  
Return  
Return  
AUX  
Return  
Re  
Left  
Out  
AUX  
3
AU  
2
AUX  
7
AUX  
6
AUX  
5
4
8
p.54  
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group module  
3
rear panel features  
lamp dim  
Goose-neck lamps light-up at full intensity.  
Goose-neck lamps light-up at medium intensity.  
meter bridge connector  
This connector carries all of the required connections up to the meter bridge.  
While patching the console, care should be taken not to damage this connector  
or the ribbon that plugs into it.  
p.55  
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X-VCA owner’s manual  
group module  
3
X-VCA GROUP OUTPUT  
(1 OF 8 SHOWN)  
MONO  
L-R  
RIBBON  
GROUP  
PAN  
GROUP  
CABLE  
INTER-  
BUS ASSIGN  
SWITCHES  
CONNECT  
GROUP  
INSERT  
ON  
XFORMER  
OPTION  
MIX AMP  
GRP  
BAL OUT  
GROUP INSERT  
SEND RTN  
GRP  
MIX  
GROUP  
POST  
O
XT  
ULE  
GROUP PRE  
PK  
GC  
VCA  
+10  
∑
GRP  
MATRIX  
SENDS  
POST  
M1  
M2  
M3  
M4  
MUTE  
GROUP  
METER SEND  
GROUP  
SIG  
GROUP PRE  
VCA MASTER  
BUSES 1-8  
GROUP  
FADER  
GROUP  
POST  
GROUP  
ATTENUATION  
METER  
VCA ASSIGN  
LATCHES  
TO EXT MTX  
MICRO  
CONTROL  
1
2
3
5
7
BUS IN  
OM  
EV  
ULE  
AFL MODE  
SOLO LEFT  
COMP  
CV  
SOLO CONTROL  
& SWITCHING  
THRESH  
ON  
THRESH  
ON  
9
ON  
AUX PRE  
AUX POST  
12  
15  
18  
21  
TO GROUP  
MIX BUS  
AUTO  
VOX PERC  
GATE  
ON  
SOFT  
KNEE  
SOLO RIGHT  
LINK  
TO ADJACENT CHANNEL  
ODD/EVEN PAIRS  
GROUP  
SOLO  
ASSIGN  
AUX  
SOLO  
AUX ODD/EVEN  
STEREO PAIR  
TO  
VCA MASTERS  
(1 OF 8 SHOWN)  
INPUT  
MICRO  
CARDS  
MUTE  
PFL  
SLAVE  
VCA  
EXPANDER  
CONTROL  
COMPRESSOR CONTROL  
UNITY  
TO GROUP FADER  
VCA ASSIGN  
LATCHES  
GROUP  
EDIT  
ASSIGN  
MICRO  
INTER-  
FACE  
THRESH  
-60 -20  
GAIN  
DB +20  
RATIO  
1:1 20:1  
THRESH  
-45 +15  
CV  
TO RIBBON  
0
CARD  
RATIO  
1:5 1:1  
GROUP  
MUTE  
SAFE  
PREVIEW  
SOLO  
TIMING CONTROL  
RMS  
DETECTOR  
FROM  
MASTER  
MICRO  
CARD  
VCA  
MASTER  
FADER  
1 OF 4  
CIRCUITS  
GROUP DYNAMICS SUB-CARD  
AUX  
MUTE  
SAFE  
PREVIEW  
TO SOLO  
TO SOLO  
AUX  
INSERT  
SEND RTN  
AUX  
LEVEL  
AUX  
XFORMER  
OPTION  
SWITCHING  
AUX PRE  
SWITCHING  
MUTE  
AUX  
BAL OUT  
MIX AMP  
AUX  
MIX  
AUX  
INSERT RTN  
GC  
∑
+10  
AUX POST  
TALK TO AUX  
TB  
FEED  
Matrix  
Expansion  
Lamp  
Dim  
Meter Bridge  
Matrix 3  
Matrix 2  
Matrix 1  
t
Out  
Out  
D
8
5
7
6
Line In 2  
Line In 2  
Line In 2  
Line In 2  
4
1
3
2
Group Out  
Group Out  
Group Out  
Group Out  
Group Out  
Group Out  
Group Out  
Group Out  
L
L
L
L
n
In  
In  
R
R
R
R
Bal Line In 2 Bal Line In 2 Bal Line In 2 Bal Line In 2  
Insert  
Send  
Insert  
Send  
Insert  
Send  
Insert  
Send  
Insert  
Send  
Insert  
Send  
Insert  
Send  
Insert  
Send  
Insert  
Send  
Insert  
Send  
Insert  
Send  
I
L
L
L
L
n
s
e
r
t
turn  
Return  
Return  
Return  
AUX  
Return  
Return  
Return  
Return  
AUX  
Return  
Return  
Return  
R
R
R
R
ono  
t
Right  
Out  
Left  
Out  
AUX  
7
AUX  
6
AUX  
5
AUX  
3
AUX  
2
AUX  
1
4
8
Ba  
Out  
Out  
Out  
Out  
Insert  
Out  
Out  
Out  
Insert  
Out  
Bal Line In 1 Bal Line In 1 Bal Line In 1 Bal Line In 1  
Insert  
Send  
Insert  
Send  
Insert  
Send  
Insert  
Send  
Insert  
Send  
Insert  
Send  
L
L
L
L
Send  
Send  
Return  
Return  
Return  
Return  
Return  
Return  
Return  
Return  
Assist Out  
Alt R Out  
Alt L Out  
R
R
R
R
Ba  
DC In  
Group In  
4
Group In  
3
Group In  
2
Group In  
1
Group In  
8
Group In  
7
Group In  
6
Group In  
5
DI  
Out  
m aster  
groups  
stereo inputs  
p.56  
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group module  
3
rear panel features  
group output  
This balanced male XLR connector carries the GROUP output signal. see—  
group fader, front-panel description  
group insert point  
Separate 1/4"TRS jacks provide the ability to insert an external signal processor  
into the signal path of the GROUP. Insert is made active by depressing Group Insert  
ON switch.  
group insert send  
This output connects to the input of an external signal processor. The  
signal is derived after the group-summing amplifier. This output is ground com-  
pensated.  
group insert return  
This balanced input accepts a signal from the output of an external sig-  
nal processor. It accepts either balanced or unbalanced signals.  
aux output  
This balanced male XLR connector carries the AUX output signal. see—aux  
master, front-panel description  
aux insert point  
Separate 1/4"TRS jacks provide the ability to insert an external signal processor  
into the signal path of the AUX. Insert is made active when a 1/4"TRS connector  
is plugged into the Aux Insert return jack.  
aux insert send  
This output connects to the input of an external signal processor. The  
signal is derived after the aux-summing amplifier. This output is ground compen-  
sated. It can also be used as pre-aux master level output without interrupting the  
normal signal flow through the aux master section.  
aux insert return  
This balanced input accepts a signal from the output of an external sig-  
nal processor. It accepts either balanced or unbalanced signals. Inserting a 1/4"  
TRS plug into this jack makes the aux insert active.  
group in  
External signal can be introduced to the group by plugging a 1/4"TRS  
connector into this jack. One primary purpose for the Group in jacks is to link  
consoles together. The group outputs from another console can be fed into these  
jacks, linking the group buses of the two consoles.  
p.57  
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X-VCA owner’s manual  
left / right & mono masters  
4
module  
panel  
block diagram  
SAFE  
SAFE  
PREVIEW  
PREVIEW  
MTX  
1
MTX  
2
MUTE  
MUTE  
10  
OUTPUT  
OUTPUT  
10  
15  
–
–
LEV  
LEV  
15  
20  
40  
0
0
+
+
20  
5
5
40  
•
10  
10  
•
TALK  
TALK  
TO  
TO  
SOLO  
SOLO  
SAFE  
SAFE  
PREVIEW  
PREVIEW  
MATRIX  
MATRIX  
M
S
SENDS10  
–
SENDS 10  
20  
–
1
2
3
4
1
2
3
4
0
0
0
0
0
0
0
0
20  
MTX  
MTX  
+
3
+
3
30  
30  
1
2
40  
•
40  
•
6
6
10  
20  
–
10  
20  
–
MUTE  
MUTE  
+
3
+
3
OUTPUT  
LEV  
+
OUTPUT  
LEV  
+
30  
30  
10  
15  
10  
15  
–
–
40  
•
40  
•
6
6
0
0
10  
20  
–
10  
20  
–
+
3
+
3
20  
5
20  
5
30  
30  
40  
•
40  
•
6
6
40  
40  
10  
20  
–
10  
20  
–
10  
10  
•
•
+
+
3
3
30  
30  
TALK  
TALK  
40  
•
40  
•
6
6
TO  
TO  
MTX SENDS  
POST LFT  
MTX SENDS  
POST RT  
HF  
3K  
HF  
3K  
6K  
6K  
12K  
12K  
SOLO  
SOLO  
1.5  
1.5  
18K  
20K  
18K  
20K  
1K  
1K  
1.5  
Q
1.5  
Q
HM  
HM  
3
2K  
.7  
3
3
3
.7  
2K  
4K  
6K  
4K  
6K  
1K  
1K  
400  
8K  
400  
8K  
1.5  
1.5  
MID  
MID  
Q
Q
3
1K  
.7  
.7  
1K  
2K  
3K  
2K  
3K  
500  
500  
200  
4K  
200  
4K  
1.5  
1.5  
LM  
LM  
Q
Q
3
.7  
600  
.7  
600  
300  
300  
120  
120  
1K  
1K  
60  
1.2K  
400  
60  
1.2K  
400  
LF 200  
LF 200  
100  
100  
600  
600  
40  
800  
–
40  
800  
–
+
+
EQ  
ON  
EQ  
ON  
FREQ  
FREQ  
/
L
R
MONO  
40 HZ  
40 HZ  
24DB OCT  
–
/
–
/
24DB OCT  
OUTPUT LIMITER  
OUTPUT LIMITER  
–
+
–
+
0
0
MAX  
(DBU)  
MAX  
3
6
3
6
(DBU)  
15  
15  
6
20  
6
20  
=
:
=
:
1
RATIO 20  
1
RATIO 20  
ON  
1
3
6
9
12  
18  
24  
ON  
1
3
6
9
12  
18  
24  
LIMIT  
LIMIT  
ON  
ON  
(
)
(
)
RMS  
RMS  
/
ATT  
(DB)  
ATT (DB)  
L
R
MONO  
/
SUM  
L
R
TO  
/
L
R
MONO  
A
TALK TO  
TALK TO  
MONO  
/
L
R
MONO  
CENTER  
L
R
PK  
L
10  
5
10  
R
5
M
SIG  
0
5
0
5
M
A
N
U
A
L
VCA  
ASSIGN  
SINGLE  
10  
10  
FOLLOW  
SCENE  
M
U
T
15  
20  
15  
20  
E
S
C
E
EDIT  
CHAN  
VCA ASN  
N
E
30  
50  
30  
50  
S
SELECT  
A
–
–
CHANNEL  
TO ASSIGN  
/
L
R
MONO  
SOLO  
SOLO  
p.58  
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left / right & mono master modules  
4
features  
Aside from their Left / Right and Mono assignments, the X-VCA Left / Right and  
Mono master modules contain identical features. One module is devoted to the  
Left and Right stereo mix and the other module is devoted to the Mono mix.  
Both modules contain the following sections:  
*
*
*
*
*
*
*
Matrix Output Control  
Matrix Send 1 though 4  
Output EQ  
RMS Output Limiter  
100mm Faders  
Microprocessor Mute Controller  
Solo  
Matrix output control  
The Left / Right master module contains Matrix Master 1 and the Mono master  
module contains Matrix Master 2.  
mute  
Mute switch  
See LOCAL MICROPROCESSOR CONTROL section  
Matrix master output level  
The MATRIX MASTER output level controls set the levels that appear at  
the corresponding MATRIX output connectors on the rear-panel.  
Talk to  
Adds theTALKBACK system output to the associated MATRIX output.The  
level of theTALKBACK signal is set by theTALKBACK level control in the MAS-  
TER section.  
solo switch  
Pressing this momentary switch will include (illuminate) or exclude (not-illu-  
minated) the channel from the consoles solo system.  
See SOLO FEATURES section.  
write-in label  
This label may be written on with a grease-marker, or dry-erase pen and later  
wiped clean. Masking tape may also be placed on this surface, if desired. If you  
write on it with a "Sharpie", you may have trouble getting the writing off. If this is  
the case, your best bet is to wipe the label off with isopropyl (rubbing) alcohol.  
p.59  
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X-VCA owner’s manual  
left / right & mono masters  
4
module  
panel  
block diagram  
SAFE  
SAFE  
PREVIEW  
PREVIEW  
MATRIX  
MATRIX  
MTX  
1
MTX  
2
SENDS10  
SENDS 10  
–
–
1
2
3
4
1
2
3
4
0
0
0
0
0
0
0
0
20  
20  
MUTE  
MUTE  
10  
+
3
+
3
OUTPUT  
OUTPUT  
10  
15  
–
–
LEV  
LEV  
15  
20  
40  
0
0
+
+
30  
30  
20  
5
5
40  
40  
40  
•
10  
10  
6
6
•
•
•
TALK  
TALK  
TO  
10  
20  
10  
20  
–
–
TO  
+
3
+
3
SOLO  
SOLO  
30  
30  
40  
40  
6
6
•
•
10  
20  
10  
20  
–
–
MATRIX  
MATRIX  
M
S
SENDS10  
–
SENDS 10  
20  
–
1
2
3
4
1
2
3
4
0
0
0
0
0
0
0
0
+
3
+
3
20  
+
3
+
3
30  
30  
30  
30  
40  
•
40  
•
6
6
10  
20  
–
10  
20  
–
40  
40  
6
6
+
3
+
3
•
•
30  
30  
10  
20  
10  
20  
–
–
40  
•
40  
•
6
6
+
3
+
3
10  
20  
–
10  
20  
–
+
3
+
3
30  
30  
30  
30  
40  
•
40  
•
6
6
40  
40  
6
6
10  
20  
–
10  
20  
–
•
•
+
+
3
3
30  
30  
MTX SENDS  
POST LFT  
MTX SENDS  
POST RT  
40  
•
40  
•
6
6
MTX SENDS  
POST LFT  
MTX SENDS  
POST RT  
HF  
3K  
HF  
3K  
6K  
6K  
12K  
12K  
1.5  
1.5  
18K  
20K  
18K  
20K  
1K  
1K  
1.5  
Q
1.5  
Q
HM  
HM  
3
2K  
.7  
3
3
3
.7  
2K  
4K  
6K  
4K  
6K  
1K  
1K  
400  
8K  
400  
8K  
1.5  
1.5  
MID  
MID  
Q
Q
3
1K  
.7  
.7  
1K  
2K  
3K  
2K  
3K  
500  
500  
200  
4K  
200  
4K  
1.5  
1.5  
LM  
LM  
Q
Q
3
.7  
600  
.7  
600  
300  
300  
120  
120  
1K  
1K  
60  
1.2K  
400  
60  
1.2K  
400  
LF 200  
LF 200  
100  
100  
600  
600  
40  
800  
–
40  
800  
–
+
+
EQ  
ON  
EQ  
ON  
FREQ  
FREQ  
/
L
R
MONO  
40 HZ  
40 HZ  
24DB OCT  
–
/
–
/
24DB OCT  
OUTPUT LIMITER  
OUTPUT LIMITER  
–
+
–
+
0
0
MAX  
(DBU)  
MAX  
3
6
3
6
(DBU)  
15  
15  
6
20  
6
20  
=
:
=
:
1
RATIO 20  
1
RATIO 20  
ON  
1
3
6
9
12  
18  
24  
ON  
1
3
6
9
12  
18  
24  
LIMIT  
LIMIT  
ON  
ON  
(
)
(
)
RMS  
RMS  
/
ATT  
(DB)  
ATT (DB)  
L
R
MONO  
/
SUM  
L
R
TO  
/
L
R
MONO  
A
TALK TO  
TALK TO  
MONO  
/
L
R
MONO  
CENTER  
L
R
PK  
L
10  
5
10  
R
5
M
SIG  
0
5
0
5
M
A
N
U
A
L
VCA  
ASSIGN  
SINGLE  
10  
10  
FOLLOW  
SCENE  
M
U
T
15  
20  
15  
20  
E
S
C
E
EDIT  
CHAN  
VCA ASN  
N
E
30  
50  
30  
50  
S
SELECT  
A
–
–
CHANNEL  
TO ASSIGN  
/
L
R
MONO  
SOLO  
SOLO  
p.60  
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left / right & mono master modules  
4
m atrix sends  
Due to space considerations, the Left Matrix sends are located on the Left / Right  
master module and the Right Matrix sends are located on the Mono master  
module. Likewise, the Mono Matrix sends are bumped down one slot and appear  
in the Master Control section.To make this more clear, refer to the illustration.  
matrix 1–4 levels—M1, M2, M3, M4  
These level controls are used to dial the LEFT, RIGHT and MONO signals  
into the corresponding matrix.  
post-group  
The LEFT, RIGHT or MONO fader setting has no effect on the group-to-  
matrix level controls 1–4.  
The LEFT, RIGHT or MONO fader is introduced into the signal path and  
will control the signal level.When the LEFT, RIGHT or MONO is muted, the  
LEFT, RIGHT or MONO signals to matrix 1-4 are muted as well.  
p.61  
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X-VCA owner’s manual  
left / right & mono masters  
4
module  
panel  
block diagram  
HF  
3K  
HF  
3K  
6K  
6K  
12K  
12K  
1.5  
1.5  
SAFE  
SAFE  
18K  
20K  
18K  
20K  
PREVIEW  
PREVIEW  
MTX  
1
MTX  
1K  
1K  
2
MUTE  
MUTE  
10  
1.5  
1.5  
HM  
1K  
HM  
OUTPUT  
OUTPUT  
10  
15  
–
–
LEV  
LEV  
Q
Q
15  
20  
40  
0
0
+
5
+
5
20  
40  
•
10  
10  
•
TALK  
TALK  
3
2K  
.7  
3
3
3
.7  
TO  
TO  
2K  
4K  
6K  
4K  
6K  
SOLO  
SOLO  
1K  
MATRIX  
MATRIX  
M
S
400  
8K  
400  
8K  
SENDS10  
–
SENDS 10  
20  
–
1
2
3
4
1
2
3
4
0
0
0
0
0
0
0
0
20  
+
3
+
3
1.5  
1.5  
30  
30  
MID  
MID  
40  
•
40  
•
Q
Q
6
6
10  
20  
–
10  
20  
–
+
3
+
3
30  
30  
40  
•
40  
•
3
1K  
.7  
.7  
6
6
10  
20  
–
10  
20  
–
1K  
+
3
+
3
2K  
3K  
2K  
3K  
500  
500  
30  
30  
40  
•
40  
•
6
6
10  
20  
–
10  
20  
–
+
3
+
3
30  
30  
40  
•
40  
•
6
6
200  
4K  
200  
4K  
MTX SENDS  
POST LFT  
MTX SENDS  
POST RT  
1.5  
1.5  
LM  
LM  
HF  
3K  
HF  
3K  
Q
Q
6K  
6K  
12K  
12K  
1.5  
1.5  
18K  
20K  
18K  
20K  
3
.7  
600  
.7  
600  
1K  
1K  
1.5  
Q
1.5  
Q
HM  
HM  
300  
300  
120  
120  
3
2K  
.7  
3
3
3
.7  
2K  
1K  
1K  
4K  
6K  
4K  
6K  
1K  
1K  
60  
1.2K  
400  
60  
1.2K  
400  
400  
8K  
400  
8K  
1.5  
1.5  
MID  
MID  
Q
Q
200  
200  
LF  
LF  
3
1K  
.7  
.7  
100  
100  
1K  
2K  
3K  
2K  
3K  
500  
500  
600  
800  
600  
800  
200  
4K  
200  
4K  
40  
40  
1.5  
1.5  
LM  
LM  
Q
Q
– +  
– +  
EQ  
ON  
EQ  
ON  
3
.7  
600  
.7  
600  
300  
300  
FREQ  
FREQ  
/
L
R
MONO  
120  
120  
1K  
1K  
40 HZ  
40 HZ  
–
/
–
/
24DB OCT  
24DB OCT  
60  
1.2K  
400  
60  
1.2K  
400  
LF 200  
LF 200  
100  
100  
600  
600  
40  
800  
–
40  
800  
–
+
+
EQ  
ON  
EQ  
ON  
FREQ  
FREQ  
/
L
R
MONO  
40 HZ  
40 HZ  
24DB OCT  
–
/
–
/
24DB OCT  
OUTPUT LIMITER  
OUTPUT LIMITER  
–
+
–
+
0
0
MAX  
(DBU)  
MAX  
3
6
3
6
(DBU)  
15  
15  
6
20  
6
20  
=
:
=
:
1
RATIO 20  
1
RATIO 20  
ON  
1
3
6
9
12  
18  
24  
ON  
1
3
6
9
12  
18  
24  
LIMIT  
LIMIT  
ON  
ON  
(
)
(
)
RMS  
RMS  
/
ATT  
(DB)  
ATT (DB)  
L
R
MONO  
/
SUM  
L
R
TO  
/
L
R
MONO  
A
TALK TO  
TALK TO  
MONO  
/
L
R
MONO  
CENTER  
L
R
PK  
L
10  
5
10  
R
5
M
SIG  
0
5
0
5
M
A
N
U
A
L
VCA  
ASSIGN  
SINGLE  
10  
10  
FOLLOW  
SCENE  
M
U
T
15  
20  
15  
20  
E
S
C
E
EDIT  
CHAN  
VCA ASN  
N
E
30  
50  
30  
50  
S
SELECT  
A
–
–
CHANNEL  
TO ASSIGN  
/
L
R
MONO  
SOLO  
SOLO  
p.62  
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left / right & mono master modules  
4
Output EQ features  
Independent stereo and mono output EQ sections are provided on X-VCA.The EQ  
consists of 5 bands and a fixed High pass filter.The High and Low bands are shelving  
EQ and the High Mid, Mid and Low mid are full parametric.Although the left and right  
signals are processed separately, the paramaters are set in tandem by common front panel  
controls.  
high frequency—HF (shelving eq)  
Boost / Cut (inner knob)15dB boost and cut.  
Frequency (outer knob) Continuously sweepable between 1kHz and 20kHz  
high mid—HM  
Bandwidth A Q range of 3.0 to 0.7 (0.5 octave to 2.0 octave) is available.  
Boost / Cut (inner knob)15dB boost and cut.  
Frequency (outer knob) Continuously sweepable between 400 Hz and 8 kHz.  
mid—MID  
Bandwidth A Q range of 3.0 to 0.7 (0.5 octave to 2.0 octave) is available.  
Boost / Cut (inner knob)15dB boost and cut.  
Frequency (outer knob) Continuously sweepable between 200 Hz and 4 kHz.  
Low mid—LM  
Bandwidth A Q range of 3.0 to 0.7 (0.5 octave to 2.0 octave) is available.  
Boost / Cut (inner knob)15dB boost and cut.  
Frequency (outer knob) Continuously sweepable between 60 Hz and 1.2 kHz.  
Low frequency—LF (shelving eq)  
Bandwidth A Q range of 3.0 to 0.7 (0.5 octave to 2.0 octave) is available.  
Turning the control full clockwise switches operation to a plus/minus shelving mode.  
Boost / Cut (inner knob)15dB boost and cut.  
Frequency (outer knob) Continuously sweepable between 40 Hz and 800  
kHz.  
eq on  
Equalizer is on. This switch is used to activate the EQ section and can be used  
to make A/B comparisons between "flat" and eq'd signals.  
high-pass filter—HPF  
The high pass filter HPF has a fixed cut off frequency of 40Hz and a 24dB per octave  
slope.  
HPF  
High-pass filter is on.  
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X-VCA owner’s manual  
left / right & mono masters  
4
module  
panel  
block diagram  
OUTPUT LIMITER  
OUTPUT LIMITER  
–
+
–
+
0
0
MAX  
MAX  
3
6
(
DBU  
)
3
6
(DBU)  
SAFE  
SAFE  
PREVIEW  
PREVIEW  
15  
15  
MTX  
1
MTX  
2
MUTE  
MUTE  
10  
6
20  
6
20  
OUTPUT  
OUTPUT  
10  
15  
–
–
LEV  
LEV  
=
:
=
:
RATIO 20  
1
RATIO 20 1  
15  
20  
40  
0
0
+
+
20  
5
5
ON  
1
ON  
1
40  
•
10  
10  
•
TALK  
TALK  
TO  
LIMIT  
LIMIT  
3
6
9
3
6
9
TO  
ON  
ON  
(
)
(
)
RMS  
RMS  
SOLO  
SOLO  
12  
18  
24  
12  
18  
24  
(
)
(
)
ATT DB  
ATT DB  
/
L
R
MONO  
MATRIX  
MATRIX  
M
S
SENDS10  
–
SENDS 10  
20  
–
1
2
3
4
1
2
3
4
0
0
0
0
0
0
0
0
20  
+
3
+
3
30  
30  
40  
•
40  
•
6
6
10  
20  
–
10  
20  
–
+
3
+
3
30  
30  
40  
•
40  
•
6
6
10  
20  
–
10  
20  
–
+
3
+
3
30  
30  
40  
•
40  
•
6
6
10  
20  
–
10  
20  
–
+
+
3
3
30  
30  
40  
•
40  
•
6
6
MTX SENDS  
POST LFT  
MTX SENDS  
POST RT  
HF  
3K  
HF  
3K  
6K  
6K  
12K  
12K  
1.5  
1.5  
18K  
20K  
18K  
20K  
1K  
1K  
1.5  
Q
1.5  
Q
HM  
HM  
3
2K  
.7  
3
3
3
.7  
2K  
4K  
6K  
4K  
6K  
1K  
1K  
400  
8K  
400  
8K  
1.5  
1.5  
MID  
MID  
Q
Q
3
1K  
.7  
.7  
1K  
2K  
3K  
2K  
3K  
500  
500  
200  
4K  
200  
4K  
1.5  
1.5  
LM  
LM  
Q
Q
3
.7  
600  
.7  
600  
300  
300  
120  
120  
1K  
1K  
60  
1.2K  
400  
60  
1.2K  
400  
LF 200  
LF 200  
100  
100  
600  
600  
40  
800  
–
40  
800  
–
+
+
EQ  
ON  
EQ  
ON  
FREQ  
FREQ  
/
L
R
MONO  
40 HZ  
40 HZ  
24DB OCT  
–
/
–
/
24DB OCT  
OUTPUT LIMITER  
OUTPUT LIMITER  
–
+
–
+
0
0
MAX  
(DBU)  
MAX  
3
6
3
6
(DBU)  
15  
15  
6
20  
6
20  
=
:
=
:
1
RATIO 20  
1
RATIO 20  
ON  
1
3
6
9
12  
18  
24  
ON  
1
3
6
9
12  
18  
24  
LIMIT  
LIMIT  
ON  
ON  
(
)
(
)
RMS  
RMS  
/
ATT  
(DB)  
ATT (DB)  
L
R
MONO  
/
SUM  
L
R
TO  
/
L
R
MONO  
A
TALK TO  
TALK TO  
MONO  
/
L
R
MONO  
CENTER  
L
R
PK  
L
10  
5
10  
R
5
M
SIG  
0
5
0
5
M
A
N
U
A
L
VCA  
ASSIGN  
SINGLE  
10  
10  
FOLLOW  
SCENE  
M
U
T
15  
20  
15  
20  
E
S
C
E
EDIT  
CHAN  
VCA ASN  
N
E
30  
50  
30  
50  
S
SELECT  
A
–
–
CHANNEL  
TO ASSIGN  
/
L
R
MONO  
SOLO  
SOLO  
p.64  
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left / right & mono master modules  
4
output limiter features  
The L/R and Mono outputs are equipped with independent output limiters.  
The limiters are located AFTER the console output faders and only affect  
the signals that appear at the main Left, Right and Mono XLR's.  
Limiting takes place according to the RMS level, allowing short term signal  
peaks to pass without attenuation. Limiters may be used for speaker pro-  
tection, or to prevent the system from producing sound levels that exceed  
local noise ordinances.The Left and Right signals are processed together by  
the Left / Right limiter (located above the Left / Right master faders) and  
the Mono signal is processed by the Mono limiter (located above the Mono  
master fader).  
The features for both the Stereo and Mono limiters are identical.  
output lim iter threshold control  
Adjusts the limit point.Any signal level beyond this point will cause  
attenuation at a ratio of 20:1. The limiter circuit provides "soft knee" limit-  
ing.This means that when a signal approaches the limit point, a certain  
amount of dynamic compression is applied in order to soften the effects of  
the limiter. Hard limiting occurs when the incoming signal is continuously  
above the limiter threshold.The threshold is adjustable from -6 to +20 dBu.  
Note: Caution should  
be exercised if a sig-  
+
output lim iter on switch  
Activates the output limiter.When activated, the LED at the top of the  
Gain Reduction meter is alluminated.  
nificant amount of gain  
reduction is displayed, as  
this may cause a deteriora-  
tion in overall sound quality.  
gain reduction m etering  
LED  
LED  
LED  
LED  
LED  
LED  
LED  
LED  
This eight segment meter indicates  
how much limiting, or signal attenuation is taking place. Since the meter is  
showing attenuation, the LED's illuminate downward, and not upward as  
one would expect with a level increase.The range displayed by the gain  
reduction meter is between 1 and 24 dB of attenuation. The top LED illu-  
mininates when the Output Limiter is on.The other seven LED's respond to  
signal attenuation.  
EXTREME CAUTION should  
be observed when removing  
or turning off any limiter.  
Depending on level settings  
and how much limiting is  
taking plase, an abrupt level  
change can take place  
that could startle listeners  
and even damage speak-  
ers.  
For more information, see the section on Gates, compressors and limiters.  
a
p.65  
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X-VCA owner’s manual  
left / right & mono masters  
4
module  
panel  
block diagram  
/
R TO  
SUM  
L
/
L
R
MONO  
SAFE  
SAFE  
PREVIEW  
PREVIEW  
TALK TO  
TALK TO  
MONO  
/
L
R
MTX  
1
MTX  
2
MUTE  
MUTE  
10  
OUTPUT  
OUTPUT  
10  
15  
–
–
LEV  
LEV  
15  
20  
40  
0
0
+
5
+
5
MONO  
CENTER  
L
R
20  
40  
•
10  
10  
•
TALK  
TALK  
TO  
TO  
SOLO  
SOLO  
PK  
10  
5
10  
MATRIX  
MATRIX  
M
S
L
R
SENDS10  
–
SENDS 10  
20  
–
1
2
3
4
1
2
3
4
0
0
0
0
0
0
0
0
20  
+
3
+
3
30  
30  
40  
•
40  
•
6
6
5
10  
20  
–
10  
20  
–
+
3
+
3
30  
30  
M
40  
•
40  
•
6
6
SIG  
10  
20  
–
10  
20  
–
0
5
0
+
3
+
3
30  
30  
40  
•
40  
•
6
6
10  
20  
–
10  
20  
–
+
+
3
3
30  
30  
5
40  
•
40  
•
6
6
MTX SENDS  
POST LFT  
MTX SENDS  
POST RT  
M
A
VCA  
HF  
3K  
HF  
3K  
6K  
6K  
ASSIGN  
SINGLE  
12K  
12K  
N
1.5  
1.5  
18K  
20K  
18K  
20K  
10  
10  
A
1K  
1K  
1.5  
Q
1.5  
Q
HM  
HM  
FOLLOW  
SCENE  
M
15  
20  
15  
20  
3
2K  
.7  
3
3
3
.7  
2K  
4K  
6K  
4K  
6K  
1K  
1K  
400  
8K  
400  
8K  
EDIT  
1.5  
1.5  
MID  
MID  
CHAN  
Q
Q
VCA ASN  
N
3
1K  
.7  
.7  
30  
50  
30  
50  
1K  
2K  
3K  
2K  
3K  
500  
500  
SELECT A  
–
–
CHANNEL  
200  
4K  
200  
4K  
TO ASSIGN  
1.5  
1.5  
LM  
LM  
Q
Q
3
.7  
600  
.7  
600  
300  
300  
120  
120  
1K  
1K  
60  
1.2K  
400  
60  
1.2K  
400  
LF 200  
LF 200  
100  
100  
600  
600  
40  
800  
–
40  
800  
–
+
+
EQ  
ON  
EQ  
ON  
FREQ  
FREQ  
/
L
R
MONO  
40 HZ  
40 HZ  
24DB OCT  
–
/
–
/
24DB OCT  
OUTPUT LIMITER  
OUTPUT LIMITER  
–
+
–
+
0
0
MAX  
(DBU)  
MAX  
3
6
3
6
(DBU)  
15  
15  
6
20  
6
20  
=
:
=
:
1
RATIO 20  
1
RATIO 20  
ON  
1
3
6
9
12  
18  
24  
ON  
1
3
6
9
12  
18  
24  
LIMIT  
LIMIT  
ON  
ON  
(
)
(
)
RMS  
RMS  
/
ATT  
(DB)  
ATT (DB)  
L
R
MONO  
/
SUM  
L
R
TO  
/
L
R
MONO  
A
TALK TO  
TALK TO  
MONO  
/
L
R
MONO  
CENTER  
L
R
PK  
L
10  
5
10  
R
5
M
SIG  
0
5
0
5
M
A
N
U
A
L
VCA  
ASSIGN  
SINGLE  
10  
10  
FOLLOW  
SCENE  
M
U
T
15  
20  
15  
20  
E
S
C
E
EDIT  
CHAN  
VCA ASN  
N
E
30  
50  
30  
50  
S
SELECT  
A
–
–
CHANNEL  
TO ASSIGN  
/
L
R
MONO  
SOLO  
SOLO  
p.66  
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left / right & mono master modules  
4
output features  
sum L/R switch (Left / Right m odule)  
Combines the Left and Right outputs into summed mono outputs.  
This feature is useful when only mono operation is required, making the left  
and right output connectors available as separate line drivers for redundan-  
cy.  
L/R to Mono switch (Mono m odule)  
Assigns the post fader left and right signals to the mono mix bus. This  
feature is useful for driving a separate mono subwoofers or delay stacks  
when signal content and level must follow the L/R outputs. If the Left / Right  
limiter is being used, it will not affect the signals being assigned by this  
switch.  
talk to L/R switch (Left / Right m odule)  
Assigns the TB (Talkback) signal to the Left and Right masters.The TB  
signal is introduced after the High pass filters and before the Insert sends.  
Note - The TB On switch must be depressed and signal must be selected  
(pink noise or oscillator) or applied (TB input) in order for the Talkback to  
be heard.  
talk to MO NO /CENTER switch (Mono m odule)  
Assigns the TB (Talkback) signal to the Mono master.The TB signal is  
introduced after the High pass filter and before the Insert send. Note - The  
TB On switch must be depressed and signal must be selected (pink noise or  
oscillator) or applied (TB input) in order for the Talkback to be heard.  
write-in label  
This label may be written on with a grease-marker, or dry-erase pen and later  
wiped clean. Masking tape may also be placed on this surface, if desired. If you  
write on it with a "Sharpie", you may have trouble getting the writing off. If this is  
the case, your best bet is to wipe the label off with isopropyl (rubbing) alcohol.  
Left and Right signal LED indicators  
Each of the Main outputs (Left, Right and Mono) have an identical pair of LED  
indicators to show signal level an peak status.  
peak indicator - PK  
LED  
(Red)The output signal is monitored both before and after the master  
fader. Overloads at either stage will cause the red peak-LED to light.  
signal present indicator—SIG  
LED  
(Green)This LED varies in brightness in response to the pre-master fader  
signal level.  
p.67  
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X-VCA owner’s manual  
left / right & mono masters  
4
module  
panel  
block diagram  
/
R TO  
SUM  
L
/
L
R
MONO  
SAFE  
SAFE  
PREVIEW  
PREVIEW  
TALK TO  
TALK TO  
MONO  
/
L
R
MTX  
1
MTX  
2
MUTE  
MUTE  
10  
OUTPUT  
OUTPUT  
10  
15  
–
–
LEV  
LEV  
15  
20  
40  
0
0
+
5
+
5
MONO  
CENTER  
L
R
20  
40  
•
10  
10  
•
TALK  
TALK  
TO  
TO  
SOLO  
SOLO  
PK  
10  
5
10  
MATRIX  
MATRIX  
M
S
L
R
SENDS10  
–
SENDS 10  
20  
–
1
2
3
4
1
2
3
4
0
0
0
0
0
0
0
0
20  
+
3
+
3
30  
30  
40  
•
40  
•
6
6
5
10  
20  
–
10  
20  
–
+
3
+
3
30  
30  
M
40  
•
40  
•
6
6
SIG  
10  
20  
–
10  
20  
–
0
5
0
+
3
+
3
30  
30  
40  
•
40  
•
6
6
10  
20  
–
10  
20  
–
+
+
3
3
30  
30  
5
40  
•
40  
•
6
6
MTX SENDS  
POST LFT  
MTX SENDS  
POST RT  
M
A
VCA  
HF  
3K  
HF  
3K  
6K  
6K  
ASSIGN  
SINGLE  
12K  
12K  
N
1.5  
1.5  
18K  
20K  
18K  
20K  
10  
10  
A
1K  
1K  
1.5  
Q
1.5  
Q
HM  
HM  
FOLLOW  
SCENE  
M
15  
20  
15  
20  
3
2K  
.7  
3
3
3
.7  
2K  
4K  
6K  
4K  
6K  
1K  
1K  
400  
8K  
400  
8K  
EDIT  
1.5  
1.5  
MID  
MID  
CHAN  
Q
Q
VCA ASN  
N
3
1K  
.7  
.7  
30  
50  
30  
50  
1K  
2K  
3K  
2K  
3K  
500  
500  
SELECT A  
–
–
CHANNEL  
200  
4K  
200  
4K  
TO ASSIGN  
1.5  
1.5  
LM  
LM  
Q
Q
3
.7  
600  
.7  
600  
300  
300  
120  
120  
1K  
1K  
60  
1.2K  
400  
60  
1.2K  
400  
LF 200  
LF 200  
100  
100  
600  
600  
40  
800  
–
40  
800  
–
+
+
EQ  
ON  
EQ  
ON  
FREQ  
FREQ  
/
L
R
MONO  
40 HZ  
40 HZ  
24DB OCT  
–
/
–
/
24DB OCT  
OUTPUT LIMITER  
OUTPUT LIMITER  
–
+
–
+
0
0
MAX  
(DBU)  
MAX  
3
6
3
6
(DBU)  
15  
15  
6
20  
6
20  
=
:
=
:
1
RATIO 20  
1
RATIO 20  
ON  
1
3
6
9
12  
18  
24  
ON  
1
3
6
9
12  
18  
24  
LIMIT  
LIMIT  
ON  
ON  
(
)
(
)
RMS  
RMS  
/
ATT  
(DB)  
ATT (DB)  
L
R
MONO  
/
SUM  
L
R
TO  
/
L
R
MONO  
A
TALK TO  
TALK TO  
MONO  
/
L
R
MONO  
CENTER  
L
R
PK  
L
10  
5
10  
R
5
M
SIG  
0
5
0
5
M
A
N
U
A
L
VCA  
ASSIGN  
SINGLE  
10  
10  
FOLLOW  
SCENE  
M
U
T
15  
20  
15  
20  
E
S
C
E
EDIT  
CHAN  
VCA ASN  
N
E
30  
50  
30  
50  
S
SELECT  
A
–
–
CHANNEL  
TO ASSIGN  
/
L
R
MONO  
SOLO  
SOLO  
p.68  
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left / right & mono master modules 4  
features  
100mm Left, Right and Mono faders  
These faders control the overall Left, Right and Mono master output levels. Note  
that the Left, Right and Mono inserts are located prior to the faders and the lim-  
iters are located AFTER the faders.  
vca assign switch  
This switch makes it possible to include a snapshot of the consolesVCA assigne-  
ments in each of the 128 micro mute scenes.  
TheVCA assignments function just as they do on a conventionalVCA con-  
sole. There is no connection between theVCA assignments and the micro mute  
section.  
Along with each of the 128 micro mute scenes, a snapshot of the consoles  
VCA assignments is included.  
For more information, see the section onVCA group assignments.  
edit channel vca assign switch  
Pressing this momentary switch puts the console into aVCA edit mode -  
Edit by channel. This mode allows you to choose a channel, then decide what  
VCA's it is assigned to.  
For more information, see the section onVCA Group Operation.  
l/r and mono solo switches  
Pressing this momentary switch will include (illuminate) or exclude (not-illu-  
minated) the channel from the consoles solo system.  
See SOLO FEATURES section.  
rear panel features  
See the rear panel features for the Master control section.  
p.69  
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master control section  
X-VCA owner’s manual  
5
module  
panel  
block diagram  
SAFE  
SAFE  
PREVIEW  
PREVIEW  
MTX  
3
MTX  
4
MUTE  
MUTE  
10  
OUTPUT  
OUTPUT  
10  
15  
–
–
LEV  
LEV  
15  
20  
40  
0
0
+
+
20  
5
5
40  
•
10  
10  
•
TALK  
TALK  
TO  
TO  
SAFE  
SAFE  
PREVIEW  
PREVIEW  
SOLO  
SOLO  
MTX  
MTX  
3
4
MUTE  
MUTE  
MATRIX  
MATRIX  
SENDS 10  
20  
–
SENDS 10  
–
20  
1
1
OUTPUT  
OUTPUT  
LEV  
+
0
0
+
+
10  
15  
10  
15  
–
–
LEV  
3
3
30  
30  
0
+
0
40  
•
40  
•
6
6
20  
5
20  
5
10  
20  
–
10  
20  
–
2
3
4
2
3
4
0
0
0
0
0
0
+
3
+
3
30  
30  
40  
40  
10  
10  
40  
•
40  
•
•
•
6
6
10  
20  
–
10  
20  
–
+
3
+
3
TALK  
TALK  
TO  
30  
30  
TO  
40  
•
40  
•
6
6
10  
20  
–
10  
20  
–
+
+
3
3
SOLO  
SOLO  
30  
30  
40  
•
40  
•
6
6
MTX SENDS  
POST MONO  
MTX  
1
IN  
4
TO ALL  
0
HF  
–
+
TB MIC  
8
8
8
15  
–
15  
0
LF  
+
8
15  
15  
10  
–
0+LEV  
5
15  
20  
40  
10  
•
HEADPHONES  
MONO  
ASSIGN  
-
L
R
PK  
EXTERNAL  
STEREO  
SIG  
PGM INPUT  
SOLO  
MONITOR  
OUT  
ALT OUT  
FROM  
L/R/M  
SOLO  
OFF  
PRE FDR  
5
LEV  
7
8
9
5
LEV  
7
8
9
10  
4
0
6
4
0
6
3
2
1
3
2
1
10  
TALK  
TO  
TALK  
TO  
SUM  
SUM  
MONO  
MONO  
TALKBACK CTRL  
5
HEADPHONES  
5
6
LEV  
7
LEV  
4
6
4
7
8
3
3
2
2
8
9
1
9
1
10  
11  
0
10  
0
PRE FDR  
PINK  
NOISE  
POST FDR  
SOURCE  
ADDITIVE  
TB  
LAST PRESS  
MODE  
ON  
(
)
TAP TO LATCH  
SOLO  
LCR TO  
ACTIVE  
OUTPUTS  
CLEAR  
ADDS MONO TO  
ALT/MON/PHONES  
SOLO CONTROL  
128  
SEQUENCED  
SCENE  
EDIT  
PREVIEW  
EDIT  
SAFE  
SINGLE  
SCENE  
MICRO  
UTILITY  
SEQUENCE  
SCENE ON  
GO  
1
2
3
M
A
N
U
A
L
4
5
6
M
U
T
E
S
C
E
N
E
S
7
8
HEADPHONE AND TALKBACK JACKS  
LOCATED BELOW ARMREST  
p.70  
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master control section  
5
features  
The Master control section offers some flexible signal routing solutions as well as  
utilitarian functions.Also included is the Microprocessor section, which is  
described separately in it's own chapter.The master control section includes the  
following features:  
*
*
*
*
*
*
Matrix Output Control  
Matrix Send 1 though 4  
External stereo program input with EQ  
Talkback input and control  
Alternate output and Monitor output control  
Headphone and solo control features  
Matrix output control  
The the master control section contains Matrix Masters 3 and 4.  
mute  
Mute switch  
See LOCAL MICROPROCESSOR CONTROL section  
Matrix master output level  
The MATRIX MASTER output level controls set the levels that appear at  
the corresponding MATRIX output connectors on the rear-panel.  
Talk to  
Adds theTALKBACK system output to the associated MATRIX output.The  
level of theTALKBACK signal is set by theTALKBACK level control in the MAS-  
TER section.  
solo switch  
Pressing this momentary switch will include (illuminate) or exclude (not-illu-  
minated) the channel from the consoles solo system.  
See SOLO FEATURES section.  
write-in label  
This label may be written on with a grease-marker, or dry-erase pen and later  
wiped clean. Masking tape may also be placed on this surface, if desired. If you  
write on it with a "Sharpie", you may have trouble getting the writing off. If this is  
the case, your best bet is to wipe the label off with isopropyl (rubbing) alcohol.  
p.71  
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master control section  
X-VCA owner’s manual  
5
module  
panel  
block diagram  
MATRIX  
MATRIX  
SENDS 10  
SENDS 10  
–
–
1
2
3
4
1
2
3
4
0
0
0
0
0
0
0
0
20  
20  
+
3
+
3
30  
30  
SAFE  
SAFE  
40  
40  
PREVIEW  
PREVIEW  
6
6
•
•
MTX  
3
MTX  
4
10  
20  
10  
20  
–
–
MUTE  
MUTE  
10  
+
3
+
3
OUTPUT  
OUTPUT  
10  
15  
–
–
LEV  
LEV  
15  
20  
40  
0
0
+
+
30  
30  
20  
5
5
40  
40  
40  
•
10  
10  
•
6
6
•
•
TALK  
TALK  
TO  
TO  
10  
20  
10  
20  
–
–
+
3
+
3
SOLO  
SOLO  
30  
30  
40  
40  
6
6
•
•
10  
20  
10  
20  
–
–
MATRIX  
MATRIX  
SENDS 10  
20  
–
SENDS 10  
–
20  
1
1
0
0
+
+
+
+
3
3
30  
30  
3
3
30  
30  
40  
•
40  
•
6
6
10  
20  
–
10  
20  
–
2
3
4
2
3
4
40  
40  
0
0
0
0
0
0
6
6
+
3
+
3
•
•
30  
30  
40  
•
40  
•
6
6
MTX SENDS  
POST MONO  
MTX 1 IN  
TO ALL 4  
10  
20  
–
10  
20  
–
+
3
+
3
30  
30  
40  
•
40  
•
6
6
10  
20  
–
10  
20  
–
+
+
3
3
30  
30  
40  
•
40  
•
6
6
MTX SENDS  
POST MONO  
MTX  
1
IN  
4
TO ALL  
0
HF  
–
+
TB MIC  
8
8
8
15  
–
15  
0
LF  
+
8
15  
15  
10  
–
0+LEV  
5
15  
20  
40  
10  
•
HEADPHONES  
MONO  
ASSIGN  
-
L
R
PK  
EXTERNAL  
STEREO  
SIG  
PGM INPUT  
SOLO  
MONITOR  
OUT  
ALT OUT  
FROM  
L/R/M  
SOLO  
OFF  
PRE FDR  
5
LEV  
7
8
9
5
LEV  
7
8
9
10  
4
0
6
4
0
6
3
2
1
3
2
1
10  
TALK  
TO  
TALK  
TO  
SUM  
SUM  
MONO  
MONO  
TALKBACK CTRL  
5
HEADPHONES  
5
6
LEV  
7
LEV  
4
6
4
7
8
3
3
2
2
8
9
1
9
1
10  
11  
0
10  
0
PRE FDR  
PINK  
NOISE  
POST FDR  
SOURCE  
ADDITIVE  
TB  
LAST PRESS  
MODE  
ON  
(
)
TAP TO LATCH  
SOLO  
LCR TO  
ACTIVE  
OUTPUTS  
CLEAR  
ADDS MONO TO  
ALT/MON/PHONES  
SOLO CONTROL  
128  
SEQUENCED  
SCENE  
EDIT  
PREVIEW  
EDIT  
SAFE  
SINGLE  
SCENE  
MICRO  
UTILITY  
SEQUENCE  
SCENE ON  
GO  
1
2
3
M
A
N
U
A
L
4
5
6
M
U
T
E
S
C
E
N
E
S
7
8
HEADPHONE AND TALKBACK JACKS  
LOCATED BELOW ARMREST  
p.72  
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master control section  
5
matrix sends  
The master control section contains two sets of Matrix sends.The first set is used  
to dial the Mono master signal into the four matrix busses.The second set is used  
to dial external signals into the four matrix busses.  
mono matrix 1–4 sends  
These level controls are used to dial the MONO signal into the correspond-  
ing matrix busses.  
matrix sends post mono  
MONO fader setting has no effect on the group-to-matrix level controls  
1–4.  
The MONO fader is introduced into the signal path and will control the sig-  
nal level.When MONO is muted, the MONO signal to matrix 1-4 is muted as  
well.  
external input to matrix 1–4 sends  
On the rear panel there are four balanced 1/4"TRS connectors.They are  
labeled Matrix 1 through 4, one input for each matrix bus.These level controls are  
used to dial external sources into the corresponding matrix.  
matrix 1 in to all 4 switch  
The signals fed into the four external matrix inputs appear at their corre-  
sponding matrix 1-4 pots, ready to be dialed onto the four matrix buses.  
The signal fed into external matrix input 1 is routed to each of the matrix 1-  
4 pots, ready to be dialed into the four matrix busses. Signals fed into matrix  
inputs 2, 3 and 4 are disregarded.  
p.73  
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master control section  
X-VCA owner’s manual  
5
module  
panel  
block diagram  
12K  
SAFE  
SAFE  
PREVIEW  
PREVIEW  
18K  
20K  
MTX  
3
MTX  
4
MUTE  
MUTE  
10  
OUTPUT  
OUTPUT  
0
HF  
10  
15  
–
–
LEV  
LEV  
15  
20  
40  
0
0
–
+
TB M  
+
+
Q
20  
5
5
40  
•
8
8
8
10  
10  
•
TALK  
TALK  
TO  
TO  
.7  
15  
–
15  
+
SOLO  
SOLO  
0
LF  
4K  
6K  
8
MATRIX  
MATRIX  
SENDS 10  
20  
–
SENDS 10  
20  
–
1
2
3
4
1
2
3
4
15  
15  
–
0
0
0
0
0
0
0
0
+
3
+
3
8K  
30  
30  
10  
0+LEV  
5
40  
•
40  
•
15  
20  
40  
6
6
Q
10  
20  
–
10  
20  
–
+
3
+
3
30  
30  
40  
•
40  
•
6
6
.7  
10  
10  
20  
–
10  
20  
–
•
+
3
+
3
30  
30  
2K  
3K  
HEADPHO  
40  
•
40  
•
6
6
MONO  
ASSIGN  
10  
20  
–
10  
20  
–
+
3
+
3
30  
30  
40  
•
40  
•
-
L R  
6
6
MTX SENDS  
POST MONO  
MTX  
1
IN  
4
4K  
TO ALL  
PK  
SIG  
EXTERNAL  
STEREO  
Q
PGM INPUT  
0
HF  
.7  
600  
–
+
TB MIC  
SOLO  
8
8
8
15  
–
15  
0
LF  
+
8
15  
15  
10  
–
0+LEV  
5
15  
20  
40  
10  
•
HEADPHONES  
MONO  
ASSIGN  
-
L
R
PK  
EXTERNAL  
STEREO  
SIG  
PGM INPUT  
SOLO  
MONITOR  
OUT  
ALT OUT  
FROM  
L/R/M  
SOLO  
OFF  
PRE FDR  
5
LEV  
7
8
9
5
LEV  
7
8
9
10  
4
0
6
4
0
6
3
2
1
3
2
1
10  
TALK  
TO  
TALK  
TO  
SUM  
SUM  
MONO  
MONO  
TALKBACK CTRL  
5
HEADPHONES  
5
6
LEV  
7
LEV  
4
6
4
7
8
3
3
2
2
8
9
1
9
1
10  
11  
0
10  
0
PRE FDR  
PINK  
NOISE  
POST FDR  
SOURCE  
ADDITIVE  
TB  
LAST PRESS  
MODE  
ON  
(
)
TAP TO LATCH  
SOLO  
LCR TO  
ACTIVE  
OUTPUTS  
CLEAR  
ADDS MONO TO  
ALT/MON/PHONES  
SOLO CONTROL  
128  
SEQUENCED  
SCENE  
EDIT  
PREVIEW  
EDIT  
SAFE  
SINGLE  
SCENE  
MICRO  
UTILITY  
SEQUENCE  
SCENE ON  
GO  
1
2
3
M
A
N
U
A
L
4
5
6
M
U
T
E
S
C
E
N
E
S
7
8
HEADPHONE AND TALKBACK JACKS  
LOCATED BELOW ARMREST  
p.74  
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master control section  
5
external stereo program input  
The external stereo program input allows a line level stereo source to be fed into  
the console, eq'd and routed to the Left/Right and mono busses.The stereo  
source can also be monitored through the solo system.This section can be used  
for stereo returns or for stereo playback through the mains.  
external stereo program input eq  
The stereo source passes through a basic eq section.The eq controls affect both  
the left and right signals together.  
HF EQ  
15db boost or cut at 12kHz with shelving characteristics  
LF EQ  
15db boost or cut at 80Hz with shelving characteristics  
program level control  
Adjusts the level of the external stereo program input signal.  
mono assignment switch  
The post-level pot external stereo program signals are summed together as  
a mono signal and are assigned to the mono mix buss with this switch.  
L-R assignment switch  
The post-level pot external stereo program signals are assigned to the left  
and right mix busses with this switch.  
peak/signal bi-color LED indicator  
LED  
This bi-color LED indicates both peak and signal present conditions. External  
program input levels within 3dB of overload will cause the RED peak LED to illu-  
minate. (If this should occur beyond an occasional flicker, the external input level  
should be reduced.) Green illumination of the LED indicates signal is present, and  
it varies in brightness in response to varying signal levels.  
external program Solo switch  
See section on Solo features for more information.  
p.75  
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master control section  
X-VCA owner’s manual  
5
module  
panel  
block diagram  
Q
SIG  
PGM INPUT  
X-VCA MA  
7
SOLO  
SAFE  
SAFE  
PREVIEW  
PREVIEW  
600  
MTX  
3
MTX  
4
MON  
O
ALT OUT  
1K  
MUTE  
MUTE  
10  
OUTPUT  
OUTPUT  
FROM  
10  
15  
–
–
LEV  
LEV  
15  
20  
40  
0
0
L/R/M  
+
5
+
5
20  
SOL  
OF  
1.2K  
400  
PRE FDR  
40  
•
10  
10  
•
ALTERNATE OUT  
M1  
M2  
TALK  
TALK  
TO  
5
LEV  
7
5
6
TO  
4
0
6
4
0
LEFT  
RIGHT  
3
2
1
3
2
1
SOLO  
SOLO  
8
600  
800  
9
10  
10  
– +  
MATRIX  
MATRIX  
SENDS 10  
20  
–
SENDS 10  
20  
–
1
2
3
4
1
2
3
4
Q
TALK  
TO  
TAL  
TO  
0
0
0
0
0
0
0
0
+
3
+
3
N
30  
30  
FREQ  
40  
•
40  
•
6
6
10  
20  
–
10  
20  
–
+
3
+
3
40 HZ  
SUM  
SU  
30  
30  
MONO  
MON  
/
4DB OCT  
40  
•
40  
•
6
6
10  
20  
–
10  
20  
–
IMITER  
MAX  
TALKBACK CTRL  
HEADPHON  
+
3
+
3
30  
30  
5
5
6
LEV  
7
SUM  
MONO  
4
6
4
7
40  
•
40  
•
6
(DBU)  
6
6
3
2
1
3
2
10  
20  
–
10  
20  
–
+
3
+
3
15  
8
30  
30  
9
1
1
11  
40  
•
40  
•
6
6
20  
0
0
10  
MTX SENDS  
POST MONO  
MTX  
TO ALL  
1
IN  
4
ALT OUT  
LEVEL  
0
HF  
–
+
TB MIC  
8
8
8
15  
–
15  
0
LF  
+
8
15  
15  
10  
–
0+LEV  
5
15  
20  
40  
TALK TO  
ALT OUT  
10  
•
HEADPHONES  
MONO  
ASSIGN  
-
L
R
TALKBACK  
AUDIO  
PK  
EXTERNAL  
STEREO  
SIG  
PGM INPUT  
PRE FDR  
SOLO  
MONITOR  
OUT  
ALT OUT  
FROM  
L/R/M  
SOLO  
OFF  
PRE FDR  
5
LEV  
7
8
9
5
LEV  
7
8
9
10  
4
0
6
4
0
6
3
2
1
3
2
1
TB AUDI  
(TO RIBBO  
10  
TALK  
TO  
TALK  
TO  
SUM  
SUM  
MONO  
MONO  
TALKBACK CTRL  
5
HEADPHONES  
L
R
POST MON PRE MON  
SOURCE SOURCE  
L
R
5
6
LEV  
7
LEV  
4
6
4
7
8
T
3
3
2
2
8
9
1
9
1
10  
11  
0
10  
0
PRE FDR  
PINK  
NOISE  
POST FDR  
SOURCE  
ADDITIVE  
TB  
LAST PRESS  
MODE  
ON  
(
)
TAP TO LATCH  
SOLO  
LCR TO  
ACTIVE  
L
R
L
R
OUTPUTS  
CLEAR  
MONITOR FEEDS  
TO OUTPUTS  
ADDS MONO TO  
ALT/MON/PHONES  
POST MON  
SOURCE  
PRE MON  
SOURCE  
SOLO CONTROL  
128  
SEQUENCED  
SCENE  
EDIT  
PREVIEW  
EDIT  
SAFE  
SINGLE  
SCENE  
MICRO  
UTILITY  
SEQUENCE  
SCENE ON  
GO  
LCR TO  
OUTPUTS  
1
2
3
PINK  
NOISE  
GEN  
M
A
N
U
A
L
POST  
PRE LEFT  
RIGHT  
LEFT  
PRE FADER  
RIGHT  
4
5
6
M
U
T
MONO  
POST FADER  
E
S
C
E
SIGNAL SOURCES  
FROM L / R / MONO  
N
E
S
7
8
HEADPHONE AND TALKBACK JACKS  
LOCATED BELOW ARMREST  
p.76  
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master control section  
5
alternate output features  
Additional outputs are available beyond matrix and headphone outputs.  
These outputs are derived from the left, right and mono mix outputs (see  
LCR to outputs switch).The outputs are available on the rear panel via male  
XLR connectors.  
LCR to outputs switch  
Adds the Mono/Center signal to all master section control outputs as  
a phantom center. This includes the Alternate Outputs, Monitor Outputs,  
and Headphone Outputs of the console. In addition, it includes the  
Mono/Center signal in the mono assisted listening output.  
alt out (from L/R/M)  
A pair of extra outputs for getting the Left, Right and mono signals out of the  
console.  
alternate output PRE FDR switch  
Left / Right and mono signals are derived after their designated master  
faders.  
Left / Right and mono signals are derived before their designated master  
faders.  
alternate output level control  
This pot controls the level that appears alternate output XLR's on the rear  
panel.  
Talk to  
Adds theTALKBACK system output to the associated alternate outputs.  
The level of theTALKBACK signal is set by theTALKBACK level control in the  
MASTER section.  
Sum Mono  
The left and right signals are summed to mono.The Alt out Left and Right  
XLRs on the rear panel carry the same mono signal.  
The left and right signals stay separate, and appear separately at the Alt out  
Left and Right XLRs on the rear panel.  
p.77  
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master control section  
X-VCA owner’s manual  
5
module  
panel  
block diagram  
(LOWER AREA)  
SOLO  
SAFE  
SAFE  
PREVIEW  
PREVIEW  
MTX  
3
MTX  
4
MONITOR  
OUT  
ALT OUT  
FROM  
MUTE  
MUTE  
10  
L/R/M  
T
OUTPUT  
OUTPUT  
10  
15  
–
–
LEV  
LEV  
15  
20  
40  
0
0
SOLO  
OFF  
+
+
PRE FDR  
20  
5
5
MONITOR OUT  
40  
•
M3 M4  
10  
10  
•
5
5
LEV  
7
LEV  
7
6
4
0
6
TALK  
TALK  
TO  
LEFT  
RIGHT  
3
2
1
TO  
8
8
SOLO  
SOLO  
SOLO  
AUDIO  
9
9
10  
10  
TALK  
TO  
TALK  
TO  
MATRIX  
MATRIX  
SENDS 10  
20  
–
SENDS 10  
20  
–
1
2
3
4
1
2
3
4
0
0
0
0
0
0
0
0
+
3
+
3
30  
30  
40  
•
40  
•
6
6
SUM  
SUM  
10  
20  
–
10  
20  
–
MONO  
MONO  
+
3
+
3
30  
30  
40  
•
40  
•
6
6
ACK CTRL  
HEADPHONES  
10  
20  
–
10  
20  
–
5
5
6
LEV  
LEV  
+
3
+
3
6
4
7
SUM  
MONO  
30  
30  
7
8
3
2
8
40  
•
40  
•
6
6
9
10  
11  
10  
20  
–
10  
20  
–
+
3
+
3
9
1
30  
30  
10  
0
40  
•
40  
•
6
6
MTX SENDS  
POST MONO  
MTX  
1
IN  
4
TO ALL  
0
HF  
MONITOR  
LEVEL  
–
+
TB MIC  
8
8
8
15  
–
15  
0
LF  
+
SOLO  
CTRL  
8
15  
15  
10  
–
0+LEV  
5
15  
20  
40  
TALK TO  
MONITOR  
10  
•
HEADPHONES  
MONO  
ASSIGN  
TALKBACK  
AUDIO  
-
L
R
PK  
EXTERNAL  
STEREO  
SOLO  
OFF  
SIG  
PGM INPUT  
SOLO  
MONITOR  
OUT  
ALT OUT  
FROM  
L/R/M  
SOLO  
OFF  
PRE FDR  
5
LEV  
7
8
9
5
LEV  
7
8
9
10  
4
0
6
4
0
6
3
2
1
3
2
1
10  
TALK  
TO  
TALK  
TO  
LEFT - RIGHT  
SUM  
SUM  
MONO  
MONO  
SOLO  
TALKBACK CTRL  
5
HEADPHONES  
5
6
LEV  
7
LEV  
L
R
4
6
AUDIO  
4
7
8
3
3
2
PRE MON  
SOURCE  
2
8
9
1
9
1
10  
11  
TAP TO  
0
10  
0
LATCH  
PRE FDR  
PINK  
NOISE  
POST FDR  
-
SOURCE  
HOLD FOR  
MOMENTARY  
L
ADDITIVE  
TB  
ON  
LAST PRESS  
MODE  
M
A
N
U
A
L
(
)
TAP TO LATCH  
R
HP  
LEVEL  
SOLO  
POST MON  
SOURCE  
LCR TO  
OUTPUTS  
ACTIVE  
CLEAR  
ADDS MONO TO  
ALT/MON/PHONES  
SOLO CONTROL  
K BACK  
VOLT  
F / ON  
128  
M
U
T
SEQUENCED  
SCENE  
E
EDIT  
PREVIEW  
EDIT  
SAFE  
S
C
E
N
E
S
JACKS LOCATED ON MASTER MODULE  
AND UNDER ARMREST  
SINGLE  
SCENE  
MICRO  
UTILITY  
SEQUENCE  
SCENE ON  
GO  
1
2
3
M
A
N
U
A
L
TALK BACK  
IN  
HEADPHONE  
OUT  
4
5
6
M
U
T
E
S
C
E
N
E
S
7
8
M
HEADPHONE AND TALKBACK JACKS  
LOCATED BELOW ARMREST  
p.78  
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master control section  
5
alternate output features  
Monitor out  
The Monitor out is very similar to the Alt out. Instead of assigning the Left and  
Right signals to the monitor out, they are always assigned.When the LCR to  
Outputs switch is depressed, the Mono master signal appears at the Monitor out-  
puts, as well (see above).The solo signal can also appear at the Monitor outputs  
(see below).  
solo off switch  
When anything on the console is solo'd, the solo signal appears at the  
Monitor output and the Left/Right (plus mono/center if selected) signals are  
muted.When solo is disengaged, the Left/Right (plus mono/center if selected) sig-  
nals return.  
When selected, the solo system no baring on the Monitor outputs.The  
Left/Right (plus mono/center if selected) signals are not interrupted. When solo  
off is selected, this output may be used as an additional set of post fader stereo  
program outputs.  
monitor output level control  
Controls the output levels feeding the monitor output XLR connectors.  
talk to  
Adds theTALKBACK system output to the associated alternate outputs.  
The level of theTALKBACK signal is set by theTALKBACK level control in the  
MASTER section.  
Sum Mono  
The left and right signals are summed to mono.The Monitor out Left and  
Right XLRs on the rear panel carry the same mono signal.  
The left and right signals stay separate, and appear separately at the Monitor  
out Left and Right XLRs on the rear panel.  
p.79  
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master control section  
X-VCA owner’s manual  
5
module  
panel  
block diagram  
SOLO  
SAFE  
SAFE  
PREVIEW  
PREVIEW  
MTX  
3
MTX  
4
MONITOR  
OUT  
ALT OUT  
FROM  
MUTE  
MUTE  
10  
L/R/M  
OUTPUT  
OUTPUT  
10  
15  
–
–
LEV  
LEV  
15  
20  
40  
0
0
SOLO  
OFF  
+
+
PRE FDR  
20  
5
5
40  
•
10  
10  
•
5
5
LEV  
7
LEV  
7
6
4
0
6
TALK  
TALK  
TO  
3
2
1
TO  
8
8
SOLO  
SOLO  
9
9
10  
10  
TALK  
TO  
TALK  
TO  
MATRIX  
MATRIX  
SENDS 10  
20  
–
SENDS 10  
20  
–
1
2
3
4
1
2
3
4
0
0
0
0
0
0
0
0
+
3
+
3
30  
30  
40  
•
40  
•
6
6
SUM  
SUM  
10  
20  
–
10  
20  
–
MONO  
MONO  
+
3
+
3
30  
30  
40  
•
40  
•
6
6
ACK CTRL  
HEADPHONES  
10  
20  
–
10  
20  
–
5
5
6
LEV  
LEV  
+
3
+
3
6
4
7
30  
30  
7
8
3
2
8
40  
•
40  
•
6
6
9
10  
11  
10  
20  
–
10  
20  
–
+
3
+
3
9
1
30  
30  
10  
0
40  
•
40  
•
6
6
MTX SENDS  
POST MONO  
MTX  
1
IN  
4
TO ALL  
0
HF  
–
+
TB MIC  
8
8
8
15  
–
15  
0
LF  
+
8
15  
15  
10  
–
0+LEV  
5
15  
20  
40  
10  
•
HEADPHONES  
MONO  
ASSIGN  
-
L
R
PK  
EXTERNAL  
STEREO  
SIG  
PGM INPUT  
SOLO  
MONITOR  
OUT  
ALT OUT  
FROM  
L/R/M  
SOLO  
OFF  
PRE FDR  
5
LEV  
7
8
9
5
LEV  
7
8
9
10  
4
0
6
4
0
6
3
2
1
3
2
1
10  
TALK  
TO  
TALK  
TO  
SUM  
SUM  
MONO  
MONO  
TALKBACK CTRL  
5
HEADPHONES  
5
6
LEV  
7
LEV  
4
6
4
7
8
3
3
2
2
8
9
1
9
1
10  
11  
0
10  
0
PRE FDR  
PINK  
NOISE  
POST FDR  
SOURCE  
ADDITIVE  
TB  
LAST PRESS  
MODE  
ON  
(
)
TAP TO LATCH  
SOLO  
LCR TO  
ACTIVE  
OUTPUTS  
CLEAR  
ADDS MONO TO  
ALT/MON/PHONES  
SOLO CONTROL  
128  
SEQUENCED  
SCENE  
EDIT  
PREVIEW  
EDIT  
SAFE  
SINGLE  
SCENE  
MICRO  
UTILITY  
SEQUENCE  
SCENE ON  
GO  
1
2
3
M
A
N
U
A
L
4
5
6
M
U
T
E
S
C
E
N
E
S
7
8
HEADPHONE AND TALKBACK JACKS  
LOCATED BELOW ARMREST  
p.80  
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master control section  
5
talkback and solo features  
talkback control  
The talkback section provides the facilities to take either an external input signal, or  
an internally generated ping noise signal and route it to the consoles outputs.This is  
useful for making announcements from the mix position and for performing system  
diagnostics when other signal sources are not readily available.  
Talkback control level  
This control sets the level of the talkback signal, whether it is from the exter-  
nal input or consists of the internal pink noise generator.  
Pink noise  
The talkback control section can get it's source signal from three places.The first  
two are the female XLR mic inputs, one is located on the front panel in the Master  
control section.The other is located below the consoles armrest, on the right side.  
The third available source signal is the pink noise generator.The source is deter-  
mined by the Pink Noise switch. For more information on theTalkback XLR mic  
inputs, see the master control section rear panel descriptions.  
The talkback control section gets it's source signal from either, or both of the  
Talkback female XLR mic inputs.  
The talkback control section gets it's source signal from the internal pink noise  
generator.  
TB ON -Talk back on  
This "soft" switch activates theTalkback section.TheTalkback section must be acti-  
vate in order for any of it's features to work.  
Tap switch once -This will toggle theTalkback section on and off.Tap once to  
turn it on, when you're done tap it again to turn it off.  
Press and hold -The switch works as a momentary button. Press it and hold it  
for more than two seconds.While the button is down, theTalkback section is acti-  
vated.When you release the button, theTalkback section shuts off.  
Headphone level  
This control sets the level that appears at the two headphone jacks. One jack  
is located on the consoles front panel, next to theTB mic input, and the other jack is  
located below the armrest.  
LCR to Outputs button  
The signals that appears at theAlt outs, the Monitor outs and the headphones  
do not include the Mono, or center output signal.  
The signals that appear at theAlt outs, the Monitor outs and the headphones  
include the Mono, or center output signal.  
p.81  
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master control section  
X-VCA owner’s manual  
5
ACK CTRL  
5
HEADPHONES  
5
6
LEV  
LEV  
6
4
7
7
8
3
2
8
SAFE  
SAFE  
9
PREVIEW  
PREVIEW  
9
1
10  
11  
MTX  
MTX  
10  
0
3
4
MUTE  
MUTE  
OUTPUT  
LEV  
+
5
OUTPUT  
LEV  
+
10  
15  
–
10  
–
PRE FDR  
15  
20  
40  
0
0
PINK  
20  
5
NOISE  
POST FDR  
40  
•
10  
10  
•
SOURCE  
TALK  
TALK  
TO  
TO  
ADDITIVE  
LAST PRESS  
TB  
SOLO  
SOLO  
ON  
MODE  
)
TO LATCH  
SOLO  
MATRIX  
MATRIX  
LCR TO  
ACTIVE  
SENDS 10  
20  
–
SENDS 10  
20  
–
1
2
3
4
1
2
3
4
0
0
0
0
0
0
0
0
OUTPUTS  
+
3
+
3
CLEAR  
30  
30  
MONO TO  
ON/PHONES  
40  
•
40  
•
6
6
SOLO CONTROL  
10  
20  
–
10  
20  
–
+
3
+
3
30  
30  
40  
•
40  
•
6
6
10  
20  
–
10  
20  
–
+
3
+
3
30  
30  
128  
40  
•
40  
•
6
6
10  
20  
–
10  
20  
–
+
3
+
3
SEQUENCED  
SCENE  
30  
30  
40  
•
40  
•
6
6
MTX SENDS  
POST MONO  
MTX  
1
IN  
4
TO ALL  
0
HF  
–
+
TB MIC  
8
8
8
15  
–
15  
0
LF  
+
8
15  
15  
10  
–
0+LEV  
5
15  
20  
40  
10  
•
HEADPHONES  
MONO  
ASSIGN  
-
L
R
PK  
EXTERNAL  
STEREO  
SIG  
PGM INPUT  
SOLO  
MONITOR  
OUT  
ALT OUT  
FROM  
L/R/M  
SOLO  
OFF  
PRE FDR  
5
LEV  
7
8
9
5
LEV  
7
8
9
10  
4
0
6
4
0
6
3
2
1
3
2
1
10  
TALK  
TO  
TALK  
TO  
SUM  
SUM  
MONO  
MONO  
TALKBACK CTRL  
5
HEADPHONES  
5
6
LEV  
7
LEV  
4
6
4
7
8
3
3
2
2
8
9
1
9
1
10  
11  
0
10  
0
PRE FDR  
PINK  
NOISE  
POST FDR  
SOURCE  
ADDITIVE  
TB  
LAST PRESS  
MODE  
ON  
(
)
TAP TO LATCH  
SOLO  
LCR TO  
ACTIVE  
OUTPUTS  
CLEAR  
ADDS MONO TO  
ALT/MON/PHONES  
SOLO CONTROL  
128  
SEQUENCED  
SCENE  
EDIT  
PREVIEW  
EDIT  
SAFE  
SINGLE  
SCENE  
MICRO  
UTILITY  
SEQUENCE  
SCENE ON  
GO  
1
2
3
M
A
N
U
A
L
4
5
6
M
U
T
E
S
C
E
N
E
S
7
8
HEADPHONE AND TALKBACK JACKS  
LOCATED BELOW ARMREST  
p.82  
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master control section  
5
solo features  
The X-VCA provides a powerful stereo solo system. Any input or output  
can be monitored pre (PFL) or after level control (AFL), as desired. The  
system may be additive (all channels selected on solo bus), or exclusive, so  
that only one solo switch is active at a time ("last pressed").Any signal being  
solo'd appears on the dedicated left and right solo meters, and is audible in  
the stereo headphone system and the Monitor outputs (unless the SOLO  
OFF button is pressed). Solo functions may be canceled by tapping any illu-  
minated solo switch, or all solo switches may simultaneously be canceled  
using the Solo Clear switch.  
Solo Control  
This covers the Solo Control features located in the Master section  
post fader switch  
Any input or output signal that is solo'd can be be derived before or after  
it's main level control. In the case of Input channels this would be the chan-  
nel fader and in the case of outputs this would be the output fader or  
rotary pot.  
Pre fader - Any input or output signal that is solo'd will be derived  
before it's main level control.  
Post fader - Any input or output signal that is solo'd will be derived  
after it's main level control.  
additive / last press pressed switch  
The solo system has two modes - ADDITIVE and LAST PRESSED.  
Additive - Multiple inputs/outputs can be solo'd at once.After soloing  
one input or output, pressing subsequent channel solo switches will contin-  
ue to add channels to the solo bus. Pressing any solo button that is already  
activated will deactivate that solo.  
Last Pressed - Only one solo can be activated at a time. Pressing  
another solo button will clear the previous solo.  
solo active / clear switch  
This momentary, illuminated switch provides two functions.  
1. Solo active - When any input/ouput on the console is solo'd, this switch it  
lit up.  
2. Clear - Pressing this switch will clear (shut off) any inputs/outputs on the  
console that are solo'd.This is especially useful when the solo system is in  
Additive mode, to clear multiple soloes with one button press.  
p.83  
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master control section  
X-VCA owner’s manual  
5
L / R  
PRE-FADER  
A
HPF  
GC  
RIGHT SIDE FOLLOWS LEFT  
∑
+10  
RIGHT POST  
ROL)  
ORS  
HI-PASS FILTERS  
40HZ@24DB/OCT  
RIGHT  
FADER  
L / R TO  
MONO  
LEVEL  
FREQ  
LEVEL  
FREQ  
LEVEL  
FREQ  
LEVEL  
FREQ  
LEVEL  
FREQ  
LEFT POST  
MONO  
SOLO  
Q
3 - 0.7  
Q
3 - 0.7  
Q
3 - 0.7  
TO SOLO BUS & MICRO INTERFACE  
TALK TO MONO  
HI-PASS FILTER  
TB  
RIGHT POST  
FEED  
MONO  
INSERT  
SEND RTN  
MONO  
EQ ON  
40HZ@24DB/OCT  
MONO  
MIX  
MONO POST  
PK  
HPF  
GC  
∑
HF  
HI MID  
MID  
200 - 4 KHZ  
LO MID  
60 - 1.2KHZ  
LF  
+10  
1K - 20 KHZ 400 - 8 KHZ  
40 - 800HZ  
HPF  
ON  
MONO  
FADER  
MIX AMP  
5-BAND SEMI-PARAMETRIC EQ  
POST  
MONO  
MONO  
PRE-FADER  
M1  
M2  
M3  
M4  
∑
SOLO LEFT  
SIG  
SOLO RIGHT  
∑
MONO TO MATRIX SENDS SHOWN.  
LEFT AND RIGHT BOTH HAVE  
IDENTICAL SETS OF MATRIX SENDS  
AND SWITCHES  
MONO  
MATRIX  
SENDS  
MAIN OUTPUT LIMITERS  
BALANCED INPUTS TO FEED  
INTERNAL MATRIX 1-4  
EXT INPUT 1 ALSO FEEDS  
L & STATUS  
TO EXT MTX  
OUTPUT  
ATTENUATION  
METER  
MATRIX EXPANSION CONNECTOR  
EXT IN 1  
TO ALL  
SOLO  
ACTIVE  
CLEAR  
TO EXT MTX  
M1  
OUTPUT  
LEVEL  
-6 DBU +20  
ON  
1
1
3
L / R  
LIMITER ON  
6
9
LAST  
M2  
M3  
M4  
PRESSED  
12  
18  
24  
2
3
4
POST  
FADER  
LEFT  
L / R STEREO  
LIMITER  
BAL OUT  
VCA  
VCA  
EXT MATRIX IN  
MATRIX SENDS  
LEFT  
POST  
EXT MATRIX IN  
XFORMER  
OPTION  
PK  
RIGHT  
TO  
LEFT  
SIDE  
L / R  
-
LF  
HF  
EXTERNAL STEREO  
PROGRAM IN  
20 : 1  
RATIO  
GROUP  
MICRO  
CARDS  
RIGHT  
POST  
SIG  
STR PGM  
LEVEL  
Y
L / R  
METER  
SENDS  
L
STEREO 2-BAND  
SHELVING EQ  
MONO  
R
MASTER  
MICRO  
INTER-  
FACE  
OUTPUT  
ATTENUATION  
METER  
TO SOLO BUS  
EXT STR PGM  
SOLO  
OUTPUT  
LEVEL  
-6 DBU +20  
ON  
1
CARD  
EXT STR PGM  
ASSIGN  
MONO  
METER  
SEND  
3
-
MONO  
LIMITER ON  
6
INPUT &  
GROUP  
CONTROL  
9
12  
18  
24  
MATRIX CIRCUITRY 1 OF 4 SHOWN  
MONO  
BAL OUT  
TO  
RIGHT  
SIDE  
MATRIX  
MATRIX  
BAL OUT  
MIX AMP  
MATRIX  
POST  
MATRIX  
MUTE  
MONO  
LIMITER  
LEVEL  
MATRIX  
PRE  
MATRIX  
MIX  
-
INPUT  
MICRO  
CARDS  
+10  
∑
TALK TO  
MATRIX  
VCA  
MONO  
POST  
XFORMER  
OPTION  
TB  
FEED  
20 : 1  
RATIO  
MUTE AND SOLO SWITCHING  
(MICRO CONTROLLED)  
TO SOLO BUS & MICRO INTERFACE  
MUTE  
SAFE  
PRVW  
SOLO  
L
Matrix  
Expansion  
Matrix 4  
Matrix 3  
Matrix 2  
Matrix 1  
Out  
Out  
Out  
Out  
In  
In  
In  
In  
Ext Mon  
In L  
Insert  
Send  
Insert  
Send  
Insert  
Send  
Ext Mon  
In R  
Return  
Return  
Return  
Mono  
Out  
Right  
Out  
Left  
Out  
Mon  
Out  
L
Mon  
Out  
R
Assist Out  
Alt R Out  
Alt L Out  
DC In  
MIDI  
In  
Out  
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master control section  
5
rear panel features  
matrix expansion  
The X-VCA offers a matrix expansion system. In additional to the four matrix  
outputs available withing the console, the individual matrix feeds can be brought  
out of the console and fed into an external matrix mixer, produced by Crest.This  
matrix mixer is the X-Matrix, a single rack space unit that provides two additional  
matrix mixes. Multiple X-Matrix units can be dasy-chained together for any num-  
ber of additional matrix mixes. For more information see the section on X-  
Matrix.  
matrix expansion connector  
A 37-pin D-Sub connector makes all of the matrix feeds available on the rear  
panel.These signals can be fed to the Crest Audio X-Matrix unit, any other Matrix  
mixer, or stand alone mixing board. Feeding these signals to a mixer other than  
the X-Matrix requires a custom-terminated multi-pin cable that mates to this  
connector.  
The following feeds are available from the Matrix expansion connector:  
1.Audio groups, 1 through 8  
2. Left, Right and Mono masters  
3. External Matrix In #1  
3.Talk back audio signal  
4. Solo audio signals  
5. Solo control signal  
6. Power feed, specifically configured to run X-Matrix units.  
*All of the audio signals are balanced.  
*The Matrix Pre/post buttons on the Groups and L/R/M masters apply to these  
feeds, as well.  
Matrix output connectors (1 through 4)  
These balanced male XLR connectors carry the Matrix master outputs 1  
through 4.  
Matrix external input connectors (1 through 4)  
These balancedTRS connectors allow external line level signals to be  
added to the four Matrix busses.Their levels are controlled by the Matrix send  
pots located in the master section. A signal fed into External Matrix 1 also gets  
routed (after it's level control) to the Matrix expansion connector.  
p.85  
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master control section  
X-VCA owner’s manual  
5
TALK TO AUX  
TB  
FEED  
S ASSIGN  
CONTROL  
WITCHES  
X-VCA MASTER MODULE  
L / R  
SOLO  
LEVEL  
FREQ  
LEVEL  
FREQ  
LEVEL  
FREQ  
LEVEL  
FREQ  
LEVEL  
FREQ  
TO SOLO BUS & MICRO INTERFACE  
Q
3 - 0.7  
Q
3 - 0.7  
Q
3 - 0.7  
2
4
6
8
TALK TO  
L
/
R
TB  
FEED  
LEFT  
INSERT  
SEND RTN  
L
/
R
EQ ON  
LEFT POST  
PUT  
ED)  
LEFT  
MIX  
+10  
HPF  
GC  
PK  
∑
HF  
HI MID  
KHZ  
MID  
200  
LO MID  
60 1.2KHZ  
LF  
1K  
-
20 KHZ 400  
-
8
-
4
KHZ  
-
40 800HZ  
-
LEFT  
FADER  
ES AS  
OW:  
SUM  
L / R  
HPF  
ON  
MIX AMPS  
STEREO 5-BAND SEMI-PARAMETRIC EQ  
RIGHT SIDE FOLLOWS LEFT  
SIG  
L
/
R
LEVEL)-  
RS / RCA  
RIGHT  
MIX  
RIGHT  
PRE-FADER  
L
/
R
HPF  
GC  
∑
PRE-FADER  
+10  
RIGHT POST  
CONTROL)  
NDICATORS  
HI-PASS FILTERS  
40HZ@24DB/OCT  
RIGHT  
FADER  
L / R TO  
MONO  
LEVEL  
FREQ  
LEVEL  
FREQ  
LEVEL  
FREQ  
LEVEL  
FREQ  
LEVEL  
FREQ  
LEFT POST  
MONO  
SOLO  
Q
3 - 0.7  
Q
3 - 0.7  
Q
3 - 0.7  
TO SOLO BUS & MICRO INTERFACE  
TALK TO MONO  
HI-PASS FILTER  
TB  
RIGHT POST  
FEED  
MONO  
INSERT  
SEND RTN  
MONO  
EQ ON  
40HZ@24DB/OCT  
MONO  
MIX  
MONO POST  
PK  
HPF  
GC  
∑
HF  
HI MID  
KHZ  
MID  
200  
LO MID  
60 1.2KHZ  
LF  
+10  
1K  
-
20 KHZ 400  
-
8
-
4
KHZ  
-
40 800HZ  
-
HPF  
ON  
MONO  
FADER  
MIX AMP  
5-BAND SEMI-PARAMETRIC EQ  
E
POST  
MONO  
MONO  
PRE-FADER  
M1  
M2  
M3  
M4  
∑
SOLO LEFT  
OLO  
MIX  
MPS  
SIG  
SOLO RIGHT  
∑
MONO TO MATRIX SENDS SHOWN.  
LEFT AND RIGHT BOTH HAVE  
IDENTICAL SETS OF MATRIX SENDS  
AND SWITCHES  
MONO  
MATRIX  
SENDS  
MAIN OUTPUT LIMITERS  
BALANCED INPUTS TO FEED  
INTERNAL MATRIX 1-4  
NTROL & STATUS  
TO EXT MTX  
EXT INPUT 1 ALSO FEEDS  
MATRIX EXPANSION CONNECTOR  
OUTPUT  
ATTENUATION  
METER  
EXT IN 1  
TO ALL  
SOLO  
TO EXT MTX  
M1  
ACTIVE  
OUTPUT  
LEVEL  
-6 DBU +20  
ON  
1
CLEAR  
1
3
L
/
R
6
LAST  
PRESSED  
LIMITER ON  
9
M2  
M3  
M4  
2
3
4
12  
18  
24  
POST  
FADER  
LEFT  
BAL OUT  
L / R STEREO  
LIMITER  
VCA  
VCA  
EXT MATRIX IN  
MATRIX SENDS  
LEFT  
28  
POST  
EXT MATRIX IN  
XFORMER  
OPTION  
ENCED  
ENE  
PK  
RIGHT  
TO  
LEFT  
SIDE  
L / R  
EDIT  
SAFE  
-
LF  
HF  
EXTERNAL STEREO  
PROGRAM IN  
20 : 1  
RATIO  
GROUP  
MICRO  
CARDS  
RIGHT  
POST  
MICRO  
UTILITY  
SIG  
STR PGM  
LEVEL  
L / R  
METER  
SENDS  
L
STEREO 2-BAND  
SHELVING EQ  
GO  
MONO  
R
MASTER  
OUTPUT  
ATTENUATION  
METER  
MICRO  
INTER-  
FACE  
TO SOLO BUS  
EXT STR PGM  
SOLO  
OUTPUT  
ON  
1
CARD  
-
INPUT &  
GROUP  
CONTROL  
LEVEL  
EXT STR PGM  
ASSIGN  
MONO  
METER  
SEND  
3
-6 DBU +20  
MONO  
LIMITER ON  
6
9
12  
18  
24  
MATRIX CIRCUITRY 1 OF 4 SHOWN  
MONO  
BAL OUT  
TO  
RIGHT  
SIDE  
MATRIX  
MATRIX  
BAL OUT  
MIX AMP  
MATRIX  
POST  
MATRIX  
MUTE  
MONO  
LIMITER  
LEVEL  
MATRIX  
PRE  
MATRIX  
MIX  
-
INPUT  
MICRO  
CARDS  
+10  
∑
TALK TO  
MATRIX  
VCA  
MONO  
POST  
XFORMER  
OPTION  
TB  
FEED  
20 : 1  
RATIO  
MUTE AND SOLO SWITCHING  
(MICRO CONTROLLED)  
TO SOLO BUS & MICRO INTERFACE  
MUTE  
SAFE  
PRVW  
SOLO  
ONTROL  
Matrix  
Expansion  
Matrix 4  
Out  
Matrix 3  
Matrix 2  
Matrix 1  
Out  
Out  
Out  
In  
In  
In  
In  
Ext Mon  
In L  
Insert  
Send  
Insert  
Send  
Insert  
Send  
Ext Mon  
In R  
Return  
Return  
Return  
Mono  
Out  
Right  
Out  
Left  
Out  
Mon  
Out  
L
Mon  
Out  
R
Assist Out  
Alt R Out  
Alt L Out  
DC In  
MIDI  
In  
Out  
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master control section  
5
rear panel features  
Left, Right and Mono insert points  
Separate send and return 1/4"TRS jacks are provided for inserting external signal  
processors into the Left, Right and Mono outputs.The insert points are located  
after the Low pass filters and before the EQ sections.  
insert send  
This jack serves as an output which gets patched to the input of a sig-  
nal processor. Plugging a 1/4"TRS plug into this jack does not break the signal  
flow of the master output..This output jack is ground-compensated.  
insert return  
The output of a signal processor is patched to jack. It can accept a bal-  
anced or unbalanced signal. Plugging a 1/4"TRS plug into this jack breaks the signal  
flow of the master output.  
Stereo Program In jacks (left and right)  
These two (left and right) 1/4"TRS jacks are used to bring balanced or  
unbalanced stereo signals into the Stereo Program In section.Typically, they can be  
the return from a stereo signal processor or the output of a two track playback  
device.  
Left, Right and Mono master outputs  
These three balanced male XLR connectors carry the Left, Right and Mono  
outputs.  
Monitor outputs (left and right)  
These two balanced male XLR connectors carry the Left and Right Monitor  
outputs 4.  
Assist output  
This balanced male XLR connector carries a signal that is made up of the  
post fader Left and Right master outputs, summed together. Pressing the LCR to  
Outputs button will add the Mono master output to this summed signal. Internal  
jumpers can be set to make the master feeds pre fader instead of post fader.  
Midi IN and OUT  
These jacks allow the microprocessor system to communicate with MIDI gear.  
See the section on the Microprocessor for more information.  
DC In  
This 7 pin connector is used to connect the power supply interconnect cable to  
the console.  
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microprocessor control  
X-VCA owner’s manual  
6
128  
SEQUENCED  
SCENE  
EDIT  
PREVIEW  
EDIT  
SAFE  
SINGLE  
SCENE  
MICRO  
UTILITY  
SEQUENCE  
SCENE ON  
GO  
1
2
3
M
A
N
U
A
L
4
5
6
M
U
T
E
S
C
E
N
E
S
7
8
HEADPHONE AND TALKBACK JACKS  
LOCATED BELOW ARMREST  
p.88  
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microprocessor control  
6
microprocessor controlled muting  
The Crest X-Series of Consoles* is equipped with a micro-con-  
trolled Mute Controller which permits the user to set-up a series  
of Mute Scenes, each controlling any combination of channels and  
outputs.These Scenes can then be recalled, either singly or in  
combination, to allow the operator to easily control the mutes  
during a performance.  
The Mute Controller features 128 Sequenced Scenes (Patches)  
along with 8 Manual Mute Scenes.The 128 Patches can be stepped  
through using a single button, or remotely activated by the use of  
MIDI patch-change commands.The Patches can be combined with  
the Manual Scenes to allow different combinations of Channel  
mutes.  
The following is a overview of the controls and indicators of the  
Mute Controller and the Channels (see diagrams on previous  
page).The following information pertains to X-Eight consoles with  
Rev 1.12 firmware, and X-Monitor consoles with Rev 1.00  
firmware.  
12-12-01 Supplementary information....  
1) To perform FULL FACTORY RESET of Micro Mute and VCA  
settings hold up/down buttons upon power-up. This will clear all  
memory and restore Micro Controller to factory presets.  
2) Do not use the "uP" parameter with the setting "OFF" in the utility  
menu until a newer EPROM version is released. Please submit your  
console serial # and shipping address to [email protected] if  
you wish to be on an EPROM distribution list for this event.  
3) EOF stands for Edit On the Fly. A new parameter offered in the  
utility menu. When selected it allows for spontaneous removal of a  
mute you have programmed in as part of a current scene.  
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microprocessor control  
6
mute control panel  
typical input or output  
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microprocessor control  
6
Mute controller  
A)Up/Down  
Each press of these switches increments or decrements the Patch Display  
(B). Holding either button down will allow quickly scrolling up or down.The  
buttons are also used to select the parameters and settings of the system  
while in Utility mode.  
B)Display  
This 4-character alpha-numeric display normally shows the current Patch (1  
through 128) being recalled. It is also used to display the parameters and  
settings of the system while in Utility mode.  
C)Edit Preview  
Pressing this switch puts the system into Edit/Preview mode, allowing the  
operator to view and change the contents of any selected Mute Scene.The  
internal red LED will blink while in this mode, along with the status LEDs (J)  
of any channels assigned to the selected Mute Scene. Pressing a Channel  
Mute Sw (K) will add or remove a channel from that Scene. Pressing the  
Edit/Preview switch again will exit back to normal operating mode.  
D)Edit Safe  
Pressing this switch puts the system into Edit Safe mode, allowing the oper-  
ator to view and change the contents of the SAFE memory.The internal  
green LED will blink while in this mode, along with any channels assigned to  
the Safe Scene. Pressing a Channel Mute Sw (K) will add or remove a chan-  
nel from the Safe Scene. If a channel is included in the Safe Scene, it can’t be  
muted from a Mute Scene.This allows the operator to remove a channel all  
Scenes without having to edit any of the Scenes themselves. Pressing the  
Edit Safe switch again will exit back to normal operating mode.  
E)Single Scene  
There are 9 mute sources available from the Mute Controller: the 8 Manual  
Mute Scenes (H), and the Micro Scene (G). Normally any or all of theses 9  
sources can be active at one time, which allows the operator to combine  
different mute patterns.The Single Scene switch, when depressed, permits  
only 1 of the 9 sources to be active at one time.  
F)Micro Utility  
This latching switch will put the system into Utility mode.The operator can  
then access and view the various parameters and functions of the controller  
using the Up/Down buttons (A) and the Display (B).  
G)Micro Scene  
This switch activates the Sequenced Scene (Patch).The display (B) shows  
which of the 128 possible Scenes are active.  
H)Manual Mutes  
These 8 switches activate the associated Manual Mute Scene.Additionally,  
these switches, along with (G), select which Mute Scene is being edited  
when in Edit Preview Mode.  
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microprocessor control  
6
mute control panel  
typical input or output  
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microprocessor control  
6
Mute controller  
I)Recall (Next)  
Each press of this switch increments the Sequenced Mutes by one, the dis-  
play (B) will reflect this.Also used to activate the displayed Scene when an  
Up/Down (A) button was used to scroll to a new Scene. In this case, an "*"  
will be displayed as the first character in the display to indicate that the dis-  
played number is not currently the active Scene. Pressing Recall will put that  
displayed Scene into place and clear the "*" from the display.  
NOTE:All of the above actions will take place, but the displayed Sequenced  
Scene will not be active (mutes not enabled) unless the Micro Scene switch  
(G) is lit. Each press of these switches increments or decrements the Patch  
Display (B). Holding either button down will allow quickly scrolling up or  
down.The buttons are also used to select the parameters and settings of  
the system while in Utility mode.  
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microprocessor control  
6
mute control panel  
typical input or output  
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microprocessor control  
6
channel mute controls  
J)Status LED  
This bi-color LED, associated with each controlled Mute, shows the condi-  
tion of that mute. One of 5 possible states is possible:  
1)Off- The channel is not controlled by the Mute Controller.  
2)Steady Red- The channel is being muted by a Mute Scene.  
3)Steady Green- The channel is in Safe Mode, can’t be muted by any  
Scene.  
4)Blink Red- The system is in Edit Preview Mode and the channel is in the  
currently selected Scene (only 1 Scene active at a time).  
5)Blink Green- The system is in Edit Safe Mode and the channel is includ-  
ed in the Safe Scene.  
K)Mute Switch  
This momentary switch toggles the Channel’s local mute and is also used to  
assign / un-assign channels to Mute and Safe Scenes when in the Edit Modes.  
L)Mute LED  
This internal Red LED will illuminate whenever the channel is muted, either  
locally or by a Mute Scene.  
NOTE: If a channel is already locally muted when a relevant Mute Scene is activated,  
this LED will remain lit. 2 sources are now telling the channel to mute; the Local  
Mute and the Mute Scene. If the Mute Sw (K) is pressed once, the local mute will be  
cleared, but no apparent change will occur.The Mute LED (L) will still be lit, and the  
Status LED (J) will still be steady Red.At this point there is only one source telling  
the channel to mute; the Mute Scene. If the Mute Scene is then disabled, the channel  
will un-mute because the Local Mute was previously cleared.The user should be  
aware of this fact:The Local Mutes can toggle invisibly behind a Mute Scene. For an  
even number of presses on the Mute Sw (K), the Local Mute will return to its origi-  
nal state, an odd number of presses will change the Local Mute to its opposite state.  
Each press of this switch increments the Sequenced Mutes by one, the display (B)  
will reflect this.Also used to activate the displayed Scene when an Up/Down (A)  
button was used to scroll to a new Scene. In this case, an "*" will be displayed as the  
first character in the display to indicate that the displayed number is not currently  
the active Scene. Pressing Recall will put that displayed Scene into place and clear  
the "*" from the display.  
NOTE:All of the above actions will take place, but the displayed Sequenced Scene  
will not be active (mutes not enabled) unless the Micro Scene switch (G) is lit. Each  
press of these switches increments or decrements the Patch Display (B). Holding  
either button down will allow quickly scrolling up or down.The buttons are also  
used to select the parameters and settings of the system while in Utility mode.  
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X-VCA owner’s manual  
microprocessor control  
6
mute control panel  
typical input or output  
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microprocessor control  
6
mute scenes  
There are 9 possible Scene sources: Manual Mute Scenes 1 thru 8, and the  
Micro Scene.The Micro Scene button (G) is the enable switch for the 128  
possible Sequenced Scenes.The 8 Manual Mutes are totally independent of  
the 128 Sequenced Scenes, giving the system a total of 136 possible mute  
patterns. Each of the 136 patterns can consist of any combination of  
Channel and Output mutes, all of the 9 possible sources can be combined  
to create additional patterns.  
Creating a Mute Scene (or Editing an existing one):  
1) Press the Edit Preview button (C), it will begin to blink, indicating that the  
system is in Edit Preview Mode.  
2) Select a Scene to Edit:The system will automatically choose a Scene to  
edit, depending on the status of the system when Edit Preview was selected.  
If the system was in Single Scene Mode (switch E depressed), the Mute  
Scene that was currently active will be selected to edit. If the system was in  
Multiple Scene Mode (switch E not depressed), the Micro Scene will be  
automatically selected for editing. If a different Scene than the default is to  
be edited, that scene should now be chosen by pressing 1 of the 9 possible  
Mute Scene buttons (G & H), it will illuminate to show its selection. Only  
one scene can be selected for editing, the condition of the Single Scene but-  
ton (E) has no effect in Edit mode.  
3) If Micro Scene is selected: If Micro Scene (G) was selected, then the  
Up/Down (A) buttons should be used to select the desired Sequenced  
Scene (Patch) to be edited.The Display (B) will indicate which of the 128  
possible patches is being worked on. Note:When returning to Normal  
Mode, the system will revert back to the Patch that was in place before  
entering Edit Mode.  
4) Assign channels to the Scene:Any channels currently assigned to the  
Scene being edited will have their Status LEDs (J) blinking Red. Pressing the  
associated Mute Sw (K) will assign / de-assign that channel to the Scene.  
5) Clearing a Mute Scene: If you wish to clear all assigned channels from a  
Scene, press and hold the Edit Safe (D) button.After a brief delay, the display  
will change to CLR?; continue to hold the button down until the display  
shows CLRD.All channels assigned to that Scene will be de-assigned and  
you can start fresh.  
6) Saving your edit: Once you have a Scene configured the way you want it,  
either press the blinking Edit Preview (C) button to exit Edit Mode and  
return to Normal Mode, or select another Scene to edit by pressing its  
associated switch (H), or, if Micro Scene was selected, press the Up/Down  
(A) keys to select a new Patch to edit.There is no STORE button to press,  
the changes take place immediately while editing, and the Scene is saved  
automatically when a new Scene is selected or upon exiting Edit mode.  
NOTE:This immediate change will be most apparent when editing a scene  
that is currently the active scene (the Mute Scene that was ON when you  
entered Edit mode).The Mute LED (L) will change along with the Status  
LED (J) as a channel is added or removed from the scene during editing.  
p.97  
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microprocessor control  
X-VCA owner’s manual  
6
mute control panel  
typical input or output  
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microprocessor control  
6
copying a mute scene  
Copying a Mute Scene:  
Mute Scenes can be copied from a Sequenced Scene (Patch) to a Manual Mute  
Scene. Manual Mutes cannot be copied to Sequenced Scenes or to each other.To  
copy a Sequenced Scene into a Manual Mute Scene, follow the steps outlined below.  
1) Press the Edit Preview button (C), it will begin to blink, indicating that the  
system is in Edit Preview Mode.  
2) Select Sequenced Scenes by pressing the Micro Scene (G) button; it will  
illuminate.  
3) Scroll to the Scene to be copied using the Up/Down (A) keys to change  
the Display (B).  
4) Hold down the Micro Scene button.The display will show "Cpy?".  
5) Still holding down the Micro Scene button (G), now also press the  
desired Manual Mute switch (H).The display will show "Copy", and the  
Sequenced Scene Mute pattern is copied to the target Manual Mute, over-  
writing whatever pattern may have originally been there.  
6)You can now select the newly created Manual Mute Scene for editing by  
pressing its select switch (G).The copied Mute pattern will be there, you  
can use that as a starting point for your edits.  
7) Exit back to Normal mode when you’re done by pressing Edit Preview  
(C) again.  
NOTE:You can use this copy feature as a way to "Back-up" your Manual  
Mute Scenes, even though you can’t copy from Manual Mutes to any other  
Mutes. Instead, use the highest numbered Patches (120 to 127) to create  
the original versions of your Manual Mute Scenes.Then use the copy func-  
tion to transfer those patterns into the Manual Mutes.You can always go  
back to the originals (120 to 127) and re-load (copy) them into the Manual  
Mutes whenever needed.You can also use Patch 128 as an All Mute memo-  
ry. Program it with all channels muted, you can then copy it to a Manual  
Mute when you need to start a Scene with all channels muted instead of all  
channels un-muted ( you already have a way to start a Scene with all chan-  
nels un-muted, you can hold down the Edit Safe button to clear all mutes in  
a Scene when editing).  
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microprocessor control  
X-VCA owner’s manual  
6
mute control panel  
typical input or output  
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6
The Safe Scene  
There may be occasions when a channel needs to be made "Safe" from all pro-  
grammed mutes.This may occur during a show when an on-stage microphone needs  
to be used as an announce mic, or a switch-over has to be made to a backup chan-  
nel due to some technical difficulty.The Safe Scene allows a channel to be removed  
from the control of all Mute Scenes without having to edit any of the scenes. Once a  
channel is assigned to the Safe Scene, it will ignore all Mute Scene commands.The  
Mute Scenes themselves are not altered, it’s only the channel’s response that has  
been changed.This allows temporary changes to be made to a show, due to nightly  
needs, without having to go in and edit the programmed scenes.You’ll probably need  
the original scenes, as is, the next time the show is performed. NOTE:The Local  
mute command is not affected by this Safe, the Local mute is always effective.  
The Safe Scene is always active, if a channel is assigned to the Safe Scene, it will  
ignore any mute commands from a Mute Scene.The Status LED (J) of a channel will  
be a steady Green color if a channel is Safe.  
Editing the Safe Scene:  
1) Enter Edit Safe Mode: Press the Edit Safe button (D), it will begin to  
blink, indicating that the system is in Edit Safe Mode.  
2) Select a channel to safe: Pressing the Mute Sw (K) of a channel will  
assign/de-assign a channel to the Safe Scene.The status LED (J) of any chan-  
nel assigned to the Safe Scene will blink Green. If a channel is currently  
muted because of a Mute Scene, assigning it to the Safe Scene will immedi-  
ately un-mute it.  
3) Clearing the Safe Scene: If you wish to clear all assigned channels  
from the Safe Scene, press and hold the Edit Preview (C) button.After a  
second or two, the display will change to CLR?. Continue to hold the but-  
ton down until the display shows CLRD.All channels assigned to the Safe  
Scene will be de-assigned and you can start fresh.  
4) Exit Edit Safe Mode: Press the blinking Edit Safe button (D) again. It  
will stop blinking and the system will return to Normal mode.Any blinking  
Green status LEDs will turn to steady Green indicating that the channel is  
in Safe mode. If a channel was previously being muted by only a Mute Scene  
(status LED was steady Red), but is now "Safe", the status LED will show  
steady Green and the Mute LED (L) will be off. If the channel was being  
muted by a Local mute, it will remain muted.The Safe Scene does not affect  
Local Mutes.  
NOTE:Assigning a channel to the Safe Scene can be done quickly if an  
emergency arises and a programmed channel has to be un-muted. It’s a  
simple 3 step process:  
1) Press the Edit Safe Sw to enter Edit Safe mode  
2) Press the Mute Sw of the desired channel- The channel will un-muted at  
this point.  
3) Press the Edit Safe Sw again to return to Normal mode  
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6
mute control panel  
typical input or output  
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microprocessor control  
6
Utilities  
The Mute Controller has a number of parameters that the user can change.A Utility  
Mode is provided for accessing these settings.The following is a current list of para-  
meters, along with their default and other possible settings.The default setting is  
shown UNDERLINED.An explanation follows on how to review or change the dif-  
ferent settings.  
Display  
Meaning  
Settings  
uP  
Micro Processor  
ON or OFF  
Determines whether the Mute System is ON or OFF.When OFF, the entire Mute  
Scene system is disabled, only the Local mutes will operate.This setting can be used  
if "Traditional" console operation is desired (i.e. No programmed scenes are want-  
ed).  
M Ch  
MIDI Channel  
01 to 16  
Sets the MIDI channel that the Controller uses to communicate to the MIDI world.  
The Mute Controller can send and receive MIDI Program changes, MIDI dumps etc.  
It does so on this channel.  
Lock  
Edit Lock  
OFF or ON  
If set to ON, prevents any changes to be made to any Mute Scene. If Edit Preview is  
pressed when LOCK is ON, "Lock" is displayed and the system will not enter Edit  
Mode.  
Dmp?  
MIDI Dump  
When activated, the contents of all the Mute Scenes are transmitted via the MIDI  
Out jack using SysEx protocol.A librarian or archiving MIDI program can be used to  
store the Mute settings externally. Note: Loading of external data via SysEx com-  
mand is always active.  
Base  
MIDI Base  
01 or 00  
There are 128 possible MIDI numbers. Do you want to start counting at 01 and  
count up to 128, or start at 00 and count up to 127 ? Different MIDI devices do it  
either way.You get to choose.  
Ext  
External Ctrl  
OFF or ON  
Normally, the Mute System uses its internal Mute Scenes to control the Console  
mutes.Alternately, MIDI Note Commands can be used to control the channel mutes  
directly.When Ext is ON, the Display(B) will show "Ext", and the normal Mute  
Scenes will be disabled.The Controller will now respond only to externally received  
Note On/Off commands (via MIDI In jack).  
Pgm  
Program Chg  
ON or OFF  
The Mute Controller normally sends a MIDI Program change command every time  
the RECALL (I) button is pressed, corresponding to the Patch number shown in the  
Display.Also, if a MIDI Pgm Chg is received, the Controller will respond by recalling  
the Patch Mute matching that Pgm Chng. Setting Pgm to OFF disables the sending  
and receiving of MIDI Pgm Changes.  
p.103  
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microprocessor control  
X-VCA owner’s manual  
6
mute control panel  
typical input or output  
p.104  
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microprocessor control  
6
Changing and reviewing the utility changes  
The Utility settings can be accessed by entering Utility Mode. Once there, the differ-  
ent parameters can be changed to suit user’s preferences.The changes stay in effect  
until they are again modified by the user, or a System Reset is performed (detailed  
later) which changes them all back to their default settings.  
Utility Mode:  
1) Enter Utility Mode: Press the Micro Utility button (F), it is a latching  
switch, and the system will stay in Utility Mode while this button is  
depressed.The Display (B) now shows the first Parameter - " uP " of the  
Parameter List.  
2) Select a Param eter to edit: Use the Up/Down keys (A) to scroll  
thru the list of available Parameters.  
3) View the current Setting: Press the Recall (I) button.The Display will  
change from showing the Parameter to showing the Parameters current  
setting.  
4) Changing the setting: While the Display is showing Parameter  
Settings (not the Parameter itself), the Up/Down keys will scroll thru the list  
of possible settings for that Parameter. Use the keys to select the new set-  
ting and press the Recall button again.The Display will briefly show " **** ",  
the displayed setting will be activated and the Display will go back to show-  
ing the Parameter. Note:The only way to get back to showing the  
Parameter is to press the Recall button, so even if no change is desired, the  
Recall button must be pressed. Make sure the display is showing the  
desired setting when you press Recall. You are now back at Step 2, and  
can continue to select and change Parameters.  
5) Exit Utility Mode: Once you’re done, press and release the Micro  
Utility (F) key, the Mute System returns to Normal Mode with the new set-  
tings in place.  
p.105  
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vca facilities  
X-VCA owner’s manual  
7
Inputs and outputs  
micro control panel  
128  
PK  
PK  
SEQUENCED  
SCENE  
L
+
8
0
6
–
MUTE  
MUTE  
R
10  
5
10  
5
10  
5
10  
5
SIG  
SIG  
VCA  
1
VCA  
2
LCR  
M
EDIT  
EDIT  
SAFE  
PREVIEW  
M
SINGLE  
SCENE  
MICRO  
UTILITY  
0
5
0
5
UNITY  
0
5
UNITY  
0
5
-
-
L R  
L R  
PAN ON  
BAL ON  
SEQUENCE  
SCENE ON  
GO  
GROUPS  
1
GROUPS  
1
1
2
3
10  
10  
10  
10  
2
3
4
5
6
7
8
2
3
4
5
6
7
8
15  
20  
15  
20  
15  
20  
15  
20  
M
A
N
U
A
L
EDIT  
VCA 1  
ASSIGN  
EDIT  
VCA 2  
ASSIGN  
30  
30  
30  
30  
4
5
6
M
U
T
40  
50  
40  
50  
40  
50  
40  
50  
E
S
C
E
N
E
S
7
8
VCA 1  
VCA 2  
SOLO  
SOLO  
SOLO  
SOLO  
VCA  
VCA  
ASSIGN  
ASSIGN  
ASSIGN  
ASSIGN  
HEADPHONE AND TALKBACK JACKS  
LOCATED BELOW ARMREST  
p.106  
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vca facilities  
7
X-VCA operation - overview  
In addition to Mute scenes, the X-VCA Micro also controls theVCA assignment for  
each Channel.A Channel on an X-VCA refers to either an Input channel (up to 52  
possible positions, depending on Console size), or an Audio Group (Total of 8).  
Unlike traditionalVCA Consoles where theVCA assignment is done with fixed  
switches, the assignment for the X-VCA is done through the on-board  
Microprocessor.This allows the X-VCA to have up to 128 differentVCA  
Assignments if need be.There is a Scene-0 default setting, which is normally active,  
or the Console can be switched so that theVCA assignment follows the current  
Scene. Using the Recall button on the Micro Panel, the user not only can step  
through 128 possible Mute Scenes, but can also change theVCA assignment on a  
Scene-per-Scene basis.  
The SOLO switches and LEDs are called upon to do double duty in the X-  
VCA; in addition to their normal SOLO functions, they are also used to program the  
VCA assignments.When used for programming theVCAs, the SOLO function is dis-  
abled, or canceled if already active. Normal SOLO functions return afterVCA assign-  
ment is done, but the prior state of the SOLO is not restored  
p.107  
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vca facilities  
X-VCA owner’s manual  
7
Inputs and outputs  
micro control panel  
128  
PK  
PK  
SEQUENCED  
SCENE  
L
+
8
0
6
–
MUTE  
MUTE  
R
10  
5
10  
5
10  
5
10  
5
SIG  
SIG  
VCA  
1
VCA  
2
LCR  
M
EDIT  
EDIT  
SAFE  
PREVIEW  
M
SINGLE  
SCENE  
MICRO  
UTILITY  
0
5
0
5
UNITY  
0
5
UNITY  
0
5
-
-
L R  
L R  
PAN ON  
BAL ON  
SEQUENCE  
SCENE ON  
GO  
GROUPS  
1
GROUPS  
1
1
2
3
10  
10  
10  
10  
2
3
4
5
6
7
8
2
3
4
5
6
7
8
15  
20  
15  
20  
15  
20  
15  
20  
M
A
N
U
A
L
EDIT  
VCA 1  
ASSIGN  
EDIT  
VCA 2  
ASSIGN  
30  
30  
30  
30  
4
5
6
M
U
T
40  
50  
40  
50  
40  
50  
40  
50  
E
S
C
E
N
E
S
7
8
VCA 1  
VCA 2  
SOLO  
SOLO  
SOLO  
SOLO  
VCA  
VCA  
ASSIGN  
ASSIGN  
ASSIGN  
ASSIGN  
HEADPHONE AND TALKBACK JACKS  
LOCATED BELOW ARMREST  
p.108  
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vca facilities  
7
VCA assigning - overview  
There are two methods available for assigning Channels to the 8VCA Masters; the  
first method views the assignment from the Channel’s perspective, the second  
method looks at assignment from theVCA Master’s point of view.The word  
"Channel" in this case refers to any of the Mono or Stereo Input modules, or any of  
the 8 Audio Groups. Both methods are referred to asVCA Assignment in this text,  
and both use the SOLO switches and LEDs of the Channels and Masters to imple-  
ment the function.When enteringVCA Edit Mode via either method, the normal  
SOLO functions of the Console are disabled. If a Solo is active when entering this  
mode, it is cleared.When exiting fromVCA Edit Mode, normal Solo functions  
return, but the state of the earlier Solo is not restored.  
NOTE:TheVCA Assignment is performed the same way regardless of whether the  
assignment is to the default Scene-0, or to any of the 128 other Scenes.TheVCA-  
Follow-Scene switch, along with the Scene # display, determine which of the 129  
possibleVCA assignments is being affected. (Scene-0 or Scene 1 thru 128).  
Method 1- Channel to Master Assignm ent:  
In this first method, the assignment is done on a Channel by  
Channel basis.The Console is put intoVCA Edit Mode by pressing the sin-  
gle EDIT-CHAN-VCA-ASN switch, located near the Mono fader; it begins  
to blink.Any one Channel can then be selected by pressing it’s Solo switch;  
it also begins blinking.That Channel’sVCA assignment will be indicated on  
the 8 MasterVCA Solo switches, any MasterVCA that the Channel is  
assigned to will have it’s Solo LED now blinking.The User can change the  
assignment by pressing any of the MasterVCA Solo switches, it will toggle  
state.When satisfied with that Channel’s assignment, the User can select  
another Channel to view/edit by pressing a new Chan Solo Switch, or can  
exit fromVCA Edit Mode by re-pressing the EDIT-CHAN-VCA-ASN switch.  
Note: If the EDIT-CHAN-VCA-ASN switch is held down for 2 seconds or  
more, the selected Channel’s assignment to all theVCA Masters (for that  
Scene only) will be cleared (un-assigned).This Clear function gives the User  
a fresh starting point for assignments. If a Channel is not selected, pressing  
the Edit ChanVCA Sw will cause an exit back to Normal Operating Mode  
when it is released.  
Method 2- Master to Channel Assignm ent:  
In this second method, the Assignment is done on a Master by Master basis.  
The Console is put intoVCA Edit Mode by pressing any one of the 8 EDIT-  
VCA#-ASSIGN switches; it begins to blink.ALL Channels assigned to that  
MasterVCA for that Scene will indicate assignment by their SOLO LEDs  
blinking.The User can toggle a Channel’s assignment to that Master by  
pressing the Channel’s Solo switch.When satisfied with that Master’s assign-  
ment, the User can select another Master to view/edit by pressing its EDIT-  
VCA#-ASSIGN switch, or can exit fromVCA Assign Mode by re-pressing  
the original EDIT-VCA#-ASSIGN switch.  
Note: If the active EDIT-VCA#-ASSIGN switch is held down for 2 seconds  
or more, all Channels assigned to thatVCA Master (for that Scene only) will  
be un-assigned.This Clear function gives the User a fresh starting point for  
assignments.  
NOTE:VCA Edits are performed LIVE.When entering eitherVCA Edit Mode, the  
selected Scene’s data forVCA Assignments and Mutes is immediately made active on  
the Console and the Channels will respond to any changes made during the Edit.  
The Assignment and Mute data that was active while in Normal Operate Mode is  
replaced with the Edit Data upon enteringVCA Edit Mode and then restored to  
Normal upon exiting fromVCA Edit.  
p.109  
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vca facilities  
X-VCA owner’s manual  
7
Inputs and outputs  
micro control panel  
128  
PK  
PK  
SEQUENCED  
SCENE  
L
+
8
0
6
–
MUTE  
MUTE  
R
10  
5
10  
5
10  
5
10  
5
SIG  
SIG  
VCA  
1
VCA  
2
LCR  
M
EDIT  
EDIT  
SAFE  
PREVIEW  
M
SINGLE  
SCENE  
MICRO  
UTILITY  
0
5
0
5
UNITY  
0
5
UNITY  
0
5
-
-
L R  
L R  
PAN ON  
BAL ON  
SEQUENCE  
SCENE ON  
GO  
GROUPS  
1
GROUPS  
1
1
2
3
10  
10  
10  
10  
2
3
4
5
6
7
8
2
3
4
5
6
7
8
15  
20  
15  
20  
15  
20  
15  
20  
M
A
N
U
A
L
EDIT  
VCA 1  
ASSIGN  
EDIT  
VCA 2  
ASSIGN  
30  
30  
30  
30  
4
5
6
M
U
T
40  
50  
40  
50  
40  
50  
40  
50  
E
S
C
E
N
E
S
7
8
VCA 1  
VCA 2  
SOLO  
SOLO  
SOLO  
SOLO  
VCA  
VCA  
ASSIGN  
ASSIGN  
ASSIGN  
ASSIGN  
HEADPHONE AND TALKBACK JACKS  
LOCATED BELOW ARMREST  
p.110  
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vca facilities  
7
VCA assigning - overview  
VCA Assignm ent- Scene-to-Scene changes:  
When operating the X-VCA inVFS Mode, up to 128 differentVCA  
assignments are possible. Each Channel can be re-assigned to differentVCA  
Masters with each Scene change.This can be most useful for theatrical per-  
formances where the Console operator is juggling many different audio  
sources during a show and a different performer takes the lead position  
depending on the particular Scene. During one scene, the lead performer is  
the artist on Channel 1, in the next Scene, the artist on Channel 5 now has  
the lead, and so on.This is not restricted to only the vocalists; the orchestra  
may also feature different lead players during different Scenes. By allowing  
the Channels to be reassigned to differentVCA Masters, the operator can  
arrange the assignments so that the lead performer is always controlled by  
the sameVCA Master. In the example above, during Scene 1, Chan 1 is  
assigned toVCA Master 1.We’ll call this our "LeadVocalVCA" . For the  
next scene, the lead changes to the performer on Channel 5. For this Scene,  
Channel 5 is assigned toVCA Master 1 and Chan 1 is assigned toVCA  
Master 2 (BkgndVocs). Instead of having to remember during a show to  
switch his attention to a different faders depending on the Scene, the opera-  
tor can set up the assignments during rehearsal so that the lead vocalist is  
always assigned toVCA Master 1. During the performance, the operator  
knows that the lead vocalist (whomever that may be) is always onVCA  
Master 1, so he can concentrate of mixing instead of trying to remember  
which fader he has to move.This same functionality can be extended to lead  
instruments, background players, chorus, etc.  
Although 128 differentVCA assignments are possible, only the relevant  
Scenes need to be programmed. If, for example, there are assignment  
changes needed during Scenes 1, 5, 12 and 23, only those particular Scenes  
need to be edited.The Scenes in-between the changing Scenes take on the  
previous Scene’s assignment and don’t have to be specifically programmed.  
In the above example, Scenes 2 thru 4 have the same assignments as Scene  
1, Scenes 6 thru 11 are the same as Scene 5, etc. If a Scene is edited, that  
edited assignment now carries through until the next edited Scene is  
encountered in the list.Again using the above example, if a change is made  
at Scene 9, that new assignment will also be in place for Scenes 10 and 11  
before changing to the new assignment previously set up at Scene 12.This  
allows the operator to quickly set upVCA assignments without having to  
concern himself with Scenes that don’t need his attention.VCA assignments  
can also be copied across different Scenes.This allows the operator to use a  
common scene as the basis for many other scenes. Common starting assign-  
ments can be safely stored at the higher Scene numbers (120-128), it’s  
unlikely that you will need to access numbers that high in a typical show.  
Using the COPY function, the operator can Copy the Starting Scene assign-  
ment from Scene 120, and then paste it into whichever Scene number is  
appropriate for the show.The newly pasted scene can then be edited to its  
final form.  
p.111  
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vca facilities  
X-VCA owner’s manual  
7
Inputs and outputs  
micro control panel  
128  
PK  
PK  
SEQUENCED  
SCENE  
L
+
8
0
6
–
MUTE  
MUTE  
R
10  
5
10  
5
10  
5
10  
5
SIG  
SIG  
VCA  
1
VCA  
2
LCR  
M
EDIT  
EDIT  
SAFE  
PREVIEW  
M
SINGLE  
SCENE  
MICRO  
UTILITY  
0
5
0
5
UNITY  
0
5
UNITY  
0
5
-
-
L R  
L R  
PAN ON  
BAL ON  
SEQUENCE  
SCENE ON  
GO  
GROUPS  
1
GROUPS  
1
1
2
3
10  
10  
10  
10  
2
3
4
5
6
7
8
2
3
4
5
6
7
8
15  
20  
15  
20  
15  
20  
15  
20  
M
A
N
U
A
L
EDIT  
VCA 1  
ASSIGN  
EDIT  
VCA 2  
ASSIGN  
30  
30  
30  
30  
4
5
6
M
U
T
40  
50  
40  
50  
40  
50  
40  
50  
E
S
C
E
N
E
S
7
8
VCA 1  
VCA 2  
SOLO  
SOLO  
SOLO  
SOLO  
VCA  
VCA  
ASSIGN  
ASSIGN  
ASSIGN  
ASSIGN  
HEADPHONE AND TALKBACK JACKS  
LOCATED BELOW ARMREST  
p.112  
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vca facilities  
7
VCA assignment 1 - detailed operation  
Note: Front Panel Switches are indicted by BOLD-HYPHENATED-CAPITALIZED-TEXT.  
For the 8VCA Masters, the switch to select the Master for assignment is indicated by  
"VCA-#-SOLO", # represents a number 1 thru 8.There are two methods for doing  
VCA Assignment on the X-VCA.  
This first m ethod assigns Channels to Masters:  
One of the Channels (any Input, or one of the 8 Audio Groups) is selected and its  
assignment to all of the 8 Masters can be viewed at a glance. Changes can be made as  
needed, and then a new Channel selected for editing. Or, the same Channel can remain  
selected and the Scene can change (using the Scroll Buttons). For this to occur, theVFS  
switch must be down. If theVFS switch is not depressed, the assignment changes are  
only affecting Scene-0, the display will have no bearing on theVCA data.VCA Safe is also  
implemented in this Mode.  
VCA Assignm ent- Channel to Masters:  
1. Starting with the Console in NOM Mode, the EDIT-CHAN-VCA-ASN switch is  
pressed.  
2.Any Solos that were active are cancelled, the Console SOLO system is disabled.The  
Safe/Preview bi-color LEDs on the Channels will switch-over from showing Mute condi-  
tions (RED=Muted, Green =Mute Safe), to showingVCA Safe (Steady Green=VCA Safe).  
3.The EDIT-CHAN-VCA-ASN sw begins to blink, indicating that the Console is inVEM  
Mode.  
4.The user must then select a Channel to edit by pressing the desired Channel’s SOLO  
switch.  
Only relevant Channel SOLO switches can be selected at this point, any non-VCA relat-  
ed Solos are ignored.  
5.That Channel’s SOLO LED then begins to also blink indicating its selection.  
6.TheVCA Assignment and Mute data for this Edit will become active, replacing the  
prior, Normal Data.  
7.AnyVCA Master that this Channel is assigned to (for this Scene) will now have its  
SOLO LED also blinking.  
8.The user can then view the Channel’s assignment by observing the blinking LEDs of  
theVCA Master Solo switches.  
9.The User can Clear the selected Channel’s assignment to any of the Masters (for this  
Scene) by pressing and holding down the blinking EDIT-CHAN-VCA-ASN switch for 2  
seconds.  
10.The assignment can be Changed by pressing any of theVCA-SOLO switches located  
below the MasterVCA faders.The LED will change state, immediately assigning or de-  
assigning that Channel to that Master.  
11.The next Channel to be viewed can now be selected by pressing its SOLO switch-  
Go to step 4 OR- the same Channel can remain selected and the next Scene assignment  
viewed- IF inVFS Mode.  
12. Use the Scroll Up/Down arrows to select another Scene to view.  
13.The user scrolls to the desired Scene and changes the assignment as in Step 7.  
14.To exitVEM Mode, the original EDIT-CHAN-VCA-ASN switch is pressed again. It  
stops blinking, the Console returns to NOM Mode and the original Scene data is  
restored–OR- The user can press one of the 8 EDIT-VCA-ASSIGN buttons and  
jump directly intoVCA Assignment Method –2 (see next page)  
p.113  
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vca facilities  
X-VCA owner’s manual  
7
Inputs and outputs  
micro control panel  
128  
PK  
PK  
SEQUENCED  
SCENE  
L
+
8
0
6
–
MUTE  
MUTE  
R
10  
5
10  
5
10  
5
10  
5
SIG  
SIG  
VCA  
1
VCA  
2
LCR  
M
EDIT  
EDIT  
SAFE  
PREVIEW  
M
SINGLE  
SCENE  
MICRO  
UTILITY  
0
5
0
5
UNITY  
0
5
UNITY  
0
5
-
-
L R  
L R  
PAN ON  
BAL ON  
SEQUENCE  
SCENE ON  
GO  
GROUPS  
1
GROUPS  
1
1
2
3
10  
10  
10  
10  
2
3
4
5
6
7
8
2
3
4
5
6
7
8
15  
20  
15  
20  
15  
20  
15  
20  
M
A
N
U
A
L
EDIT  
VCA 1  
ASSIGN  
EDIT  
VCA 2  
ASSIGN  
30  
30  
30  
30  
4
5
6
M
U
T
40  
50  
40  
50  
40  
50  
40  
50  
E
S
C
E
N
E
S
7
8
VCA 1  
VCA 2  
SOLO  
SOLO  
SOLO  
SOLO  
VCA  
VCA  
ASSIGN  
ASSIGN  
ASSIGN  
ASSIGN  
HEADPHONE AND TALKBACK JACKS  
LOCATED BELOW ARMREST  
p.114  
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vca facilities  
7
VCA Safe Mode  
The user can choose to "SAFE" a Channel from ALL itsVCA Assignments  
while in eitherVCA Edit Mode.This doesn’t actually change any of the  
assignments in memory, it only isolates the selected Channel from the  
effects of the assignment- only the Local Fader will have control over the  
ChannelVCA once SAFED, theVCA Mute will also have no effect on the  
Channel.This is similar to the Mute Safe condition, where a Channel will  
ignore any Mute patterns it’s assigned to without having to actually change  
the Mute Patterns.There is only 1 setting for allVCA-Safe data.  
VCA Safes can be edited while in eitherVCA Edit Mode:  
The Channel Safe/Preview bi-color LEDs will indicateVCA Safe while in  
VEM Mode.Any Channel that isVCA safed will have its Safe/Preview LED lit  
steady green.Any Channel that is notVCA Safe will have the LED turned  
OFF.All other Safe/Preview LEDs associated with other Programmed mutes  
(Aux and Matrix masters) will be OFF.Those LEDs have no function in this  
VEM Mode.  
To change a Channel’sVCA Safe status, press it’s associated MUTE switch.  
The MUTE switch itself will be lit if the Channel is muted, or un-lit if  
unmuted, pressing it will not affect the status of that switch or the Mute, it  
will only toggle the state of theVCA Safe.  
To clear all theVCA Safes, use the Edit Safe button on the Micro Panel.  
Press and hold it down for at least 2 seconds, allVCA Safes will be cleared.  
Note:There is no warning that this Clear will occur.  
p.115  
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vca facilities  
X-VCA owner’s manual  
7
Inputs and outputs  
micro control panel  
128  
PK  
PK  
SEQUENCED  
SCENE  
L
+
8
0
6
–
MUTE  
MUTE  
R
10  
5
10  
5
10  
5
10  
5
SIG  
SIG  
VCA  
1
VCA  
2
LCR  
M
EDIT  
EDIT  
SAFE  
PREVIEW  
M
SINGLE  
SCENE  
MICRO  
UTILITY  
0
5
0
5
UNITY  
0
5
UNITY  
0
5
-
-
L R  
L R  
PAN ON  
BAL ON  
SEQUENCE  
SCENE ON  
GO  
GROUPS  
1
GROUPS  
1
1
2
3
10  
10  
10  
10  
2
3
4
5
6
7
8
2
3
4
5
6
7
8
15  
20  
15  
20  
15  
20  
15  
20  
M
A
N
U
A
L
EDIT  
VCA 1  
ASSIGN  
EDIT  
VCA 2  
ASSIGN  
30  
30  
30  
30  
4
5
6
M
U
T
40  
50  
40  
50  
40  
50  
40  
50  
E
S
C
E
N
E
S
7
8
VCA 1  
VCA 2  
SOLO  
SOLO  
SOLO  
SOLO  
VCA  
VCA  
ASSIGN  
ASSIGN  
ASSIGN  
ASSIGN  
HEADPHONE AND TALKBACK JACKS  
LOCATED BELOW ARMREST  
p.116  
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vca facilities  
7
VCA assignment 2 Detailed Operation  
There are two methods for doingVCA Assign on the X-VCA.  
Note: Front Panel Switches are indicted by BOLD-HYPHENATED-CAPITALIZED-  
TEXT. For the 8VCA Masters, the switch to select the Master for editing is indicat-  
ed by " EDIT-VCA#-ASSIGN", # represents a number 1 thru 8.This second method  
assigns Masters to Channels:  
One of the 8VCA Masters is selected and its assignment to all of the Channels can  
be viewed at a glance.The assignment to that selected Master can be cleared, and  
changes can be made as needed.A new Master can then be selected for viewing /  
editing, or the same Master can remain selected and the Scene number can change  
(using the Scroll Buttons). For this second instance to occur, theVFS switch must be  
down and steady Red. If theVFS switch is not depressed, or if it is blinking Red, the  
assignment changes will only affect Scene-0.  
VCA Assignm ent- Masters to Channels:  
1. Starting with the Console in NOM Mode, one of the 8 EDIT-VCA#-ASSIGN switches is  
pressed.  
2.Any Solos that were active are cancelled, the Console SOLO system is disabled.The  
Channel Status LEDs switch over to displayVCA Safe status.  
3.The selected EDIT-VCA#-ASSIGN sw begins to blink, indicating that the Console is inVEM  
Mode  
4.TheVCA Assignment and Mute data for this Edit will become active, replacing the prior,  
Normal Data.  
5. If theVFS Sw is UP, any edits are performed on Scene-0, IfVFS is Down (lit RED), the edits  
will apply to the Scene number indicated on the display.  
6.ALL Channels that this Master is assigned to (for this Scene) will have their SOLO LEDs  
blinking.  
7.The user can then view the Master’s assignment by observing the blinking LEDs of the  
Channel Solo switches.  
8.The User can choose to Clear the assignment (un-assign ALL Channels) by holding down  
the currently selected EDIT-VCA#-ASSIGN switch for at least 2 seconds.All assigned  
Channels will then be un-assigned for this Master for this Scene. Note:There is no indication  
or warning that this Clear will occur, so be cautious.  
9.The assignment can be changed by pressing any of the Channel SOLO switches.The LED  
will change state, assigning or de-assigning that Channel to that Master. Only Channels can be  
assigned to aVCA Master, so only Channel SOLO switches have any effect at this time, other  
non-relevant SOLO switches are ignored.  
10.The next Master to be viewed can now be selected by pressing its EDIT switch- Go to  
step 3  
OR- the same Master can remain selected and the next Scene assignment viewed.  
11. Use the Scroll Up/Down arrows to select another Scene to view (ifVFS is Down).The  
current assignment will automatically carry over to the following higher numbered Scenes,  
that assignment can be edited and then the edited version carries over to any higher num-  
bered Scenes.  
12.The user scrolls to the desired Scene and changes the assignment as in Step 6.  
13.To exitVEM Mode, the currently selected EDIT-VCA#-ASSIGN switch is pressed again. It  
stops blinking, the Console returns to NOM Mode.The initial Scene # is restored if a scroll  
button changed the Scene # during the Edit process –OR- The user can press the EDIT-  
CHAN-VCA-ASN button and jump directly intoVCA Assignment Method –1 (see previous  
page).  
p.117  
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vca facilities  
X-VCA owner’s manual  
7
Inputs and outputs  
micro control panel  
128  
PK  
PK  
SEQUENCED  
SCENE  
L
+
8
0
6
–
MUTE  
MUTE  
R
10  
5
10  
5
10  
5
10  
5
SIG  
SIG  
VCA  
1
VCA  
2
LCR  
M
EDIT  
EDIT  
SAFE  
PREVIEW  
M
SINGLE  
SCENE  
MICRO  
UTILITY  
0
5
0
5
UNITY  
0
5
UNITY  
0
5
-
-
L R  
L R  
PAN ON  
BAL ON  
SEQUENCE  
SCENE ON  
GO  
GROUPS  
1
GROUPS  
1
1
2
3
10  
10  
10  
10  
2
3
4
5
6
7
8
2
3
4
5
6
7
8
15  
20  
15  
20  
15  
20  
15  
20  
M
A
N
U
A
L
EDIT  
VCA 1  
ASSIGN  
EDIT  
VCA 2  
ASSIGN  
30  
30  
30  
30  
4
5
6
M
U
T
40  
50  
40  
50  
40  
50  
40  
50  
E
S
C
E
N
E
S
7
8
VCA 1  
VCA 2  
SOLO  
SOLO  
SOLO  
SOLO  
VCA  
VCA  
ASSIGN  
ASSIGN  
ASSIGN  
ASSIGN  
HEADPHONE AND TALKBACK JACKS  
LOCATED BELOW ARMREST  
p.118  
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vca facilities  
7
VCA copy  
It is possible to copy aVCA assignment from one Scene location to another. Copies can be  
made between Scene-0 and any Sequenced Scene, or a copy can be performed from a  
Sequenced Scene to Scene-0,or between two Sequenced Scenes.The Copy function is a one-  
shot only process, multiple Paste operations cannot be performed.AVCA Copy can only be  
performed while the Console is in EditVCA Master Mode.Although you can only edit one  
Master at a time, the Copy function copies ALLVCA assignment data in that Scene, not just  
the Master you happen to be editing. Follow these steps to perform aVCA Copy:  
1. EnterVCA Edit Mode by briefly pressing one of the 8 EditVCA Master switches  
2. It will begin to blink and the Console will enterVCA Edit Mode  
3. If theVFS switch is UP, you will be editing Scene-0 data. If Down (lit), the display  
will indicate which Seq Scene you are currently on.You can move between Scene-  
0 and the Seq Scenes by using theVFS switch.  
4. If you wish to copy from a Sequenced Scene, press theVFS switch down.  
5. Use the Scroll buttons to move to the Scene number you wish to Copy FROM  
6. Press the Edit Preview (Copy) button on the Micro Control Panel  
7. It will begin to blink indicating that the Scene data has been copied to a buffer  
8.The NEXT button will light up.This is the Paste button for this procedure  
9. Use the Scroll buttons to move to the Scene you wish to Copy TO, or release  
theVFS switch if you wish to paste the data into Scene-0.  
10. Press the NEXT (Paste) button to complete the operation.The current Scene  
data is replaced by the copied data.  
11.The Edit Preview and NEXT switches turned off after the Paste operation, to  
perform another Copy, go to Step 3  
12.If you wish to abort a Copy operation,re-press the blinking Edit Preview (Copy)  
button. It will turn off along with the NEXT button.  
13. Re-press the original (now blinking) EditVCA Master switch to de-select it and  
return to Normal Operate Mode.  
p.119  
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vca facilities  
X-VCA owner’s manual  
7
Inputs and outputs  
micro control panel  
128  
PK  
PK  
SEQUENCED  
SCENE  
L
+
8
0
6
–
MUTE  
MUTE  
R
10  
5
10  
5
10  
5
10  
5
SIG  
SIG  
VCA  
1
VCA  
2
LCR  
M
EDIT  
EDIT  
SAFE  
PREVIEW  
M
SINGLE  
SCENE  
MICRO  
UTILITY  
0
5
0
5
UNITY  
0
5
UNITY  
0
5
-
-
L R  
L R  
PAN ON  
BAL ON  
SEQUENCE  
SCENE ON  
GO  
GROUPS  
1
GROUPS  
1
1
2
3
10  
10  
10  
10  
2
3
4
5
6
7
8
2
3
4
5
6
7
8
15  
20  
15  
20  
15  
20  
15  
20  
M
A
N
U
A
L
EDIT  
VCA 1  
ASSIGN  
EDIT  
VCA 2  
ASSIGN  
30  
30  
30  
30  
4
5
6
M
U
T
40  
50  
40  
50  
40  
50  
40  
50  
E
S
C
E
N
E
S
7
8
VCA 1  
VCA 2  
SOLO  
SOLO  
SOLO  
SOLO  
VCA  
VCA  
ASSIGN  
ASSIGN  
ASSIGN  
ASSIGN  
HEADPHONE AND TALKBACK JACKS  
LOCATED BELOW ARMREST  
p.120  
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vca facilities  
7
VCA Assignment - starting fresh  
When creating an assignment list for a new show, it’s usually a good idea to clear out the  
assignments from the previous show. Even thought editing assignments is not difficult, there  
may be a series of edits that you may run into in your old list that need to be cancelled.  
Instead of having to worry about which assignments need to be changed, the X-VCA per-  
mits the assignments to be cleared by using the Utility function of the Micro.Two separate  
clear functions are provided; the first clears the Default Assignment, the second clears the  
Sequenced Scene Assignments.The Default Assignment is also referred to as the "Scene-0"  
Assignment.This theVCA assignment the Console reverts to whenever theVFS (VCA  
Follow Scene) switch is in the UP position.AnyVCA edits performed while this switch is  
UP affect this Default Scene.The Sequenced Scenes are the 128 Scenes accessed by the  
Recall (Next) button. Each press of this button steps the Console to the next Scene in the  
list.This recalls the storedVCA assignments plus any Scene Mutes that are stored.To Clear  
the twoVCA Assignment memories, use the Utility Mode:  
1. Press the Utility switch on the Micro Panel, it will latch down, putting the sys-  
tem into Utility Mode.  
2. Use the Scroll Down key until you see "VCA0" or "VCAS" in the display.VCA0  
represents the Default Scene-0,VCAS represents ALL the Sequenced Scenes (128  
total).  
3.To clear the Default Scene, press the NEXT button when "VCA0" is shown in  
the display.  
4.The display will now show "Clr?". Pressing the NEXT key again will clear the  
VCA assignment for the Default Scene-0.The display will show ****, and ALL  
Channels will be un-assigned to allVCA Masters for the Default Scene-0.  
5. If you don’t wish to perform the Clear, press the Scroll Up or Down key.The  
display will show "Hold". Pressing the NEXT key will maintain(Hold) the current  
Default assignment and allow you to go on to other Utility functions.  
6. If you wish to clear ALL the 128 Sequenced SceneVCA assignments, perform  
steps 3,4 & 5 as above, but starting with "VCAS" in the display.  
7. Press the Utility button again to release it to exit Utility Mode and return to  
Normal Operating Mode.  
p.121  
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vca facilities  
X-VCA owner’s manual  
7
Inputs and outputs  
micro control panel  
128  
PK  
PK  
SEQUENCED  
SCENE  
L
+
8
0
6
–
MUTE  
MUTE  
R
10  
5
10  
5
10  
5
10  
5
SIG  
SIG  
VCA  
1
VCA  
2
LCR  
M
EDIT  
EDIT  
SAFE  
PREVIEW  
M
SINGLE  
SCENE  
MICRO  
UTILITY  
0
5
0
5
UNITY  
0
5
UNITY  
0
5
-
-
L R  
L R  
PAN ON  
BAL ON  
SEQUENCE  
SCENE ON  
GO  
GROUPS  
1
GROUPS  
1
1
2
3
10  
10  
10  
10  
2
3
4
5
6
7
8
2
3
4
5
6
7
8
15  
20  
15  
20  
15  
20  
15  
20  
M
A
N
U
A
L
EDIT  
VCA 1  
ASSIGN  
EDIT  
VCA 2  
ASSIGN  
30  
30  
30  
30  
4
5
6
M
U
T
40  
50  
40  
50  
40  
50  
40  
50  
E
S
C
E
N
E
S
7
8
VCA 1  
VCA 2  
SOLO  
SOLO  
SOLO  
SOLO  
VCA  
VCA  
ASSIGN  
ASSIGN  
ASSIGN  
ASSIGN  
HEADPHONE AND TALKBACK JACKS  
LOCATED BELOW ARMREST  
p.122  
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vca facilities  
7
VCA Mute switch  
Each of the 8VCA Masters has a Mute Switch associated with it.When this momentary  
switch is pressed, it will light steady RED and all Channels assigned to thatVCA Master, for  
that Scene, will mute. Pressing the Mute switch again will cause it to turn off, and any  
Channels assigned to thatVCA Master will un-mute.This Mute switch is under Local con-  
trol only, it’s On/Off status is not stored with any of the Mute orVCA Scenes. However, if  
it is active (ON) and theVCA assignment changes because of a Scene change, the newly  
assigned Channels will mute.You can think of theVCA Mutes as eight additional Mute  
Scenes which can change on a Scene-by-Scene basis.When a Channel is muted via aVCA  
Mute, only the Channel MUTE LED will illuminate, the Safe/Preview LED associated with  
each Chan Mute will not.This Safe/Prev LED only lites RED when a Micro or Manual Mute  
is commanding the Channel to Mute.Two conditions will prevent a Channel from muting  
with aVCA Mute:  
1. Channel has been "Mute Safed". If a Channel has been set to Mute Safe (using the Edit  
Safe Mode), the Channel’s Safe/Prev LED will be steady Green and the Channel will ignore  
ALL mute commands except for the Local Mute.With the X-VCA, this also includes the  
VCA Mute.  
2. Channel has been "VCA Safed".With the X-VCA, it is possible to SAFE a Channel from  
itsVCA assignment.This Safe will also prevent the Channel from responding to aVCA  
Mute, the Channel ignores not only theVCA assignment, but also anyVCA Mutes.The  
Channel will still respond to all other Mute commands  
In the X-VCA, a Channel can be muted by any of the following 4 methods:  
1. Micro Mute- Mute command from one of the 128 Sequenced Mute Scenes (Use Edit  
Preview to program). Safe/Prev LED will light steady RED when active. Local Mute Sw can-  
not change Channel mute state unless Console is in EOF Mode.  
2. Manual Mute- Mute command from any of the 8 Manual Mute Scenes (Use Edit Preview  
to program). Safe/Prev LED will light steady RED when active. Local Mute Sw cannot  
change Channel mute state unless Console is in EOF Mode.  
3.VCA Mute- Mute command from any of the possible 8VCA Masters that the Channel  
has been assigned to (Use either of theVCA Edit Modes to assign). Local Mute Sw cannot  
change Channel mute state, and the Channel Safe/Prev LED is unaffected. EOF Mode has  
no affect onVCA Mute.A Channel can only be un-muted by releasing theVCA Master  
Mute, or setting the Channel toVCA Safe or Mute Safe.A Channel will not respond to a  
VCA Mute (or aVCA level change) if it has been set toVCA Safe, it no longer thinks it’s  
assigned to that (or any other)VCA Master.  
4. Local Mute. If no other Mute is present (Micro, Manual orVCA), this momentary switch  
will toggle between On/Off with each press to locally mute a Channel.Additionally, the  
LED in the switch indicates a Channel mute (from any source) by turning RED. If EOF  
Mode is active, the Local Mute switch will toggle a Channel mute Off and On if a Micro or  
Manual Mute command initially caused a Channel Mute.The Safe/Prev LED will blink, in this  
case, if a Channel’s mute status was changed from Mute to un-Mute by using the Local  
Mute Switch. It will return to steady RED if the Channel is re-toggled to the muted state  
using the Local Mute Sw. If EOF Mode is OFF, the Local Mute Sw has NO EFFECT on the  
condition of the Channel’s mute. Prior versions of X-Eight software allowed a "Hidden"  
mute to occur behind the Micro Mute. Once the Micro Mute was removed, the Channel  
may or may not have remained muted, depending on how many presses (odd or even) that  
the user applied to the Mute Sw while another mute was present.This hidden-mute "fea-  
ture" has been removed on X-VCA.  
p.123  
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vca facilities  
X-VCA owner’s manual  
7
Inputs and outputs  
micro control panel  
128  
PK  
PK  
SEQUENCED  
SCENE  
L
+
8
0
6
–
MUTE  
MUTE  
R
10  
5
10  
5
10  
5
10  
5
SIG  
SIG  
VCA  
1
VCA  
2
LCR  
M
EDIT  
EDIT  
SAFE  
PREVIEW  
M
SINGLE  
SCENE  
MICRO  
UTILITY  
0
5
0
5
UNITY  
0
5
UNITY  
0
5
-
-
L R  
L R  
PAN ON  
BAL ON  
SEQUENCE  
SCENE ON  
GO  
GROUPS  
1
GROUPS  
1
1
2
3
10  
10  
10  
10  
2
3
4
5
6
7
8
2
3
4
5
6
7
8
15  
20  
15  
20  
15  
20  
15  
20  
M
A
N
U
A
L
EDIT  
VCA 1  
ASSIGN  
EDIT  
VCA 2  
ASSIGN  
30  
30  
30  
30  
4
5
6
M
U
T
40  
50  
40  
50  
40  
50  
40  
50  
E
S
C
E
N
E
S
7
8
VCA 1  
VCA 2  
SOLO  
SOLO  
SOLO  
SOLO  
VCA  
VCA  
ASSIGN  
ASSIGN  
ASSIGN  
ASSIGN  
HEADPHONE AND TALKBACK JACKS  
LOCATED BELOW ARMREST  
p.124  
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vca facilities  
7
VCA Master Solo/Assign switch  
Each of the 8VCA Masters has its own SOLO switch.This switch has 2 functions-Solo and  
Assign:  
VCA Assign: When in Edit ChanVCA Mode, this switch is used to assign a  
MasterVCA to a Channel for a particular Scene (Default Scene-0 or one of the  
128 Sequenced Scenes). Pressing the switch will toggle it from ON-blinking  
(Channel assigned), to OFF (Channel un-assigned).  
VCA Solo: The second function of the switch isVCA Solo.When the Console is  
operating in Normal Mode, pressing this switch will activate the Solo of ALL  
Channels (Inputs and Groups) assigned to thatVCA Master for that particular  
Scene.This Solo switch follows the two Solo modes:Additive and Last Pressed.  
If in Last Pressed Mode, theVCA Solo switch is treated as any other Solo switch on the  
Console; pressing it will clear any previous active solos and activate itself (LED turns ON)  
and all Channels (by activating their Solo LED and circuitry) assigned to it (for that Scene).  
Pressing any other Solo switch while thatVCA Solo is active will turn off thatVCA Solo  
and all Channels associated with it.This last function will also work within theVCA Solo  
grouping; if the Solo sw of one of the Channels activated by theVCA Solo is pressed, that  
Channel will remain solo’d while clearing out the rest of the group.The SOLO CLEAR  
switch always performs as expected; pressing it clears ALL active Solos.  
If in Additive Mode, pressing theVCA Solo switch will turn on its LED and add the  
assigned Channels (by activating their Solo LEDs and circuitry) to any other currently  
active Solo signals. Pressing theVCA Solo switch again will turn its LED off and will remove  
those assigned Channels from the Solo system (by de-activating their Solo LEDs and cir-  
cuitry).  
Listen to one Channel of aVCA Group (Additive Mode): If a single Channel of group is  
individually solo’d and then itsVCA Group is solo’d, the first Channel remains solo’d and  
the other members of theVCA Group are added to it.When theVCA Solo is de-activated  
by re-pressing theVCA Solo switch, the initial Channel remains solo’d. It can be cleared by  
the Solo Clear switch or by re-pressing its own Solo switch.This feature allows the opera-  
tor to listen to an isolated member of a group first and then add the rest of the group to  
the solo mix.An example would be – monitor one of the back-ground singers (all assigned  
to the sameVCA Group) by pressing the desired Channel Solo sw. Now listen to the  
blend of all the background vocals together by pressing theVCA Solo sw. Now return to  
monitoring the original Channel by re-pressing theVCA Solo switch to de-activate it and  
its assigned Channels- except for the original Channel which remains solo’d because it had  
been solo’d prior to theVCA Group being selectected.  
p.125  
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vca facilities  
X-VCA owner’s manual  
7
Inputs and outputs  
micro control panel  
128  
PK  
PK  
SEQUENCED  
SCENE  
L
+
8
0
6
–
MUTE  
MUTE  
R
10  
5
10  
5
10  
5
10  
5
SIG  
SIG  
VCA  
1
VCA  
2
LCR  
M
EDIT  
EDIT  
SAFE  
PREVIEW  
M
SINGLE  
SCENE  
MICRO  
UTILITY  
0
5
0
5
UNITY  
0
5
UNITY  
0
5
-
-
L R  
L R  
PAN ON  
BAL ON  
SEQUENCE  
SCENE ON  
GO  
GROUPS  
1
GROUPS  
1
1
2
3
10  
10  
10  
10  
2
3
4
5
6
7
8
2
3
4
5
6
7
8
15  
20  
15  
20  
15  
20  
15  
20  
M
A
N
U
A
L
EDIT  
VCA 1  
ASSIGN  
EDIT  
VCA 2  
ASSIGN  
30  
30  
30  
30  
4
5
6
M
U
T
40  
50  
40  
50  
40  
50  
40  
50  
E
S
C
E
N
E
S
7
8
VCA 1  
VCA 2  
SOLO  
SOLO  
SOLO  
SOLO  
VCA  
VCA  
ASSIGN  
ASSIGN  
ASSIGN  
ASSIGN  
HEADPHONE AND TALKBACK JACKS  
LOCATED BELOW ARMREST  
p.126  
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vca facilities  
7
VCA channel solo  
Solo operation of a Channel assigned to multiple VCA Groups:  
It is possible for a Channel to be assigned to more than one (up to 8 possible)VCA  
Masters. How it responds to multipleVCA Solos is now discussed.  
In Additive Mode, more than one signal can be solo’d. If a single Channel is assigned to mul-  
tipleVCA Groups, and thoseVCA Groups are simultaneously solo’d (via theirVCA Solo  
switch), the Channel has to respond properly to the different Solo combinations.The differ-  
ent possibilities are listed below:  
1. Channel individually solo’d, then 1VCA Group also solo’d:  
Channel remains solo’d as other channels in Group become active because of  
VCA Solo.WhenVCA Solo OFF, initial Channel stays solo’d, other channels in  
Group un-solo (Case outlined above- Listen to one Channel, then others in the  
Group, then back to initial Channel)  
2. Channel initially un-solo’d, then 1VCA Group solo’d:  
Channel solo is activated along with other channels of Group. If Channel is indi-  
vidually un-solo’d, rest of channels in Group stays solo’d,VCA Solo-OFF un-solos  
all.  
3. Channel initially un-solo’d, then multiple VCA Groups solo’d:  
Channel solo is activated along with other channels of any solo’d Groups. If  
Channel is individually un-solo’d, the rest of the channels in that Group stays  
solo’d,VCA Solo-OFF un-solos all channels of that particular Group.The solo  
function of a particular Channel is an OR operation on the solo commands from  
each of the possible 8VCA Groups the Channel is assigned to, plus the local  
Channel solo. Once a Channel is solo’d by aVCA Solo-ON command (or multi-  
pleVCA-Ons), pressing the Channel Solo Switch will un-solo the Channel. By re-  
pressing the Chan Solo Sw, the Chan solo will once again become active, but the  
Chan will no longer be associated with any particularVCA Group. Solo Clear, or  
re-pressing the Chan Solo Sw will be the only way to un-solo the Channel at this  
point. If anotherVCA Group Solo is activated, and the Channel is assigned to that  
Group, the Channel will solo, and the Channel will be associated with thatVCA  
Group. If thatVCA Group Solo is turned off, the Channel will follow and also un-  
solo.  
p.127  
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Solo - VCA edit switch  
X-VCA owner’s manual  
8
Inputs and outputs  
micro control panel  
128  
PK  
PK  
SEQUENCED  
SCENE  
L
+
8
0
6
–
MUTE  
MUTE  
R
10  
5
10  
5
10  
5
10  
5
SIG  
SIG  
VCA  
1
VCA  
2
LCR  
M
EDIT  
EDIT  
SAFE  
PREVIEW  
M
SINGLE  
SCENE  
MICRO  
UTILITY  
0
5
0
5
UNITY  
0
5
UNITY  
0
5
-
-
L R  
L R  
PAN ON  
BAL ON  
SEQUENCE  
SCENE ON  
GO  
GROUPS  
1
GROUPS  
1
1
2
3
10  
10  
10  
10  
2
3
4
5
6
7
8
2
3
4
5
6
7
8
15  
20  
15  
20  
15  
20  
15  
20  
M
A
N
U
A
L
EDIT  
VCA 1  
ASSIGN  
EDIT  
VCA 2  
ASSIGN  
30  
30  
30  
30  
4
5
6
M
U
T
40  
50  
40  
50  
40  
50  
40  
50  
E
S
C
E
N
E
S
7
8
VCA 1  
VCA 2  
SOLO  
SOLO  
SOLO  
SOLO  
VCA  
VCA  
ASSIGN  
ASSIGN  
ASSIGN  
ASSIGN  
HEADPHONE AND TALKBACK JACKS  
LOCATED BELOW ARMREST  
p.128  
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Solo - VCA edit switch  
8
Solo - VCA edit switch  
Throughout the X-VCA console, Stereo Solo/VCA edit switches can be  
found on just about every input and output.  
The Solo -VCA edit switch has two functions: it can be used to activate or  
deactivate the channels solo feature, or it can be used to include or exclude  
the channel from one or moreVCA groups.  
Solo Functions  
Pressing this switch will include (solid illumination) or exclude  
(not illuminated) the input channel from the consoles solo system.  
As determined by a switch within the master solo control section,  
signal many be monitor pre fader (in stereo) or post fader/post bal-  
ance pot in correct panoramic positioning. Once placed in the con-  
sole solo system, the channel may be removed locally by pressing  
the switch again. The channel also may be removed by using the  
Solo Clear function or by pressing another channel’s Solo-VCA Edit  
switch when the Last Pressed solo mode is selected in the master  
section. (See master section - solo control.)  
When illuminated, it indicates that the channel is being solo'd and  
may be heard within the master monitor section as well as displayed  
on the left/right solo meters.  
VCA Channel Assignment Function  
When the console is placed inVCA Edit mode, this switch is  
used to include the channel in, or exclude it from, one or moreVCA  
groups. For a complete discussion see the section onVCA Group  
Operation.  
p.129  
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dynamics control  
X-VCA owner’s manual  
9
p.130  
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dynamics control  
9
X-VCA dynamics control  
Introduction  
The X-VCA includes a number of features for control of signal dynamics in both the  
Audio Group and Master sections. In many situations, these on-board features elimi-  
nate the need for outboard dynamics processors.This not only reduces costs and con-  
serves rack space, but also allows operators to keep their attention focused on the  
console at all times.  
Note: The following material is not intended to serve as a comprehensive discussion  
of general principles and techniques involved in dynamics processing. The content  
here is restricted to the specific controls and applications of the X-VCA. It is assumed  
the operator is familiar with general approaches to dynamics processing.  
p.131  
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dynamics control  
X-VCA owner’s manual  
9
p.132  
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dynamics control  
9
Group section: Compressor/Limiter functions  
The gate and compressor functions affect all signals summed into their respective Audio Group  
buses. Also, since the Audio Group external inputs are located pre-dynamics, the  
compressor/limiter and gate functions also can be used to control dynamics of an external sig-  
nal (e.g. separate submixer).  
To set up the compressor/limiter function:  
1. If desired, link adjacent odd and even channels for stereo operation - Pressing the STEREO  
LINK switch links the two channels for stereo operation. The channel with the highest amount  
of attenuation becomes the controlling channel for both channels of the stereo pair. This  
ensures that the stereo signal tracks evenly in the final stereo mix. The LED lights to indicate  
stereo link is active.  
NOTE:You may use the stereo link function to key operation of one channel by the signal of  
the paired channel. To do this, first set the controlled channel Ratio to 1:1 andThreshold to 0  
or above. Then, set the controlling channelThreshold and Ratio controls to achieve the desired  
compression effect on the controlled channel.  
2. Select compressor mode (VOX, PERC or AUTO) - Selecting either or both switches turns  
the Compressor system on.The ON/THR LED will light to indicate compressor function is  
active. PressVOX for attack and release times optimized for vocals (slow averaging). Press  
PERC for attack and release times optimized for percussion (fast averaging). Press both for  
AUTO mode (attack and release times are determined by signal characteristics).  
3. Select Hard or Soft Knee - Pressing this switch down sets the compressor for a Soft Knee  
characteristic. When the threshold level is reached, the onset of compression is gradual, with  
the ratio increased "softly" until the set ratio is reached. Soft Knee compression tends to be  
more forgiving and "musical." When the switch is up, the compressor/limiter exhibits a "hard  
knee" characteristic.When input signals reach the threshold, output is immediately reduced by  
the set ratio. This characteristic is best employed for overload protection using higher thresh-  
old settings.  
4. Set compressor/limiter threshold - Set the COMPTHR control to the input signal level  
where you wish compressor action take effect.Any signal level above this setting will cause a  
reduction in output signal as determined by the RATIO setting.The dual color ON/THR LED  
lights red when the signal surpasses set threshold level.  
5. Set compressor/limiter ratio - Set the COMP RATIO control to determine the desired  
amount of proportional amount gain reduction to occur whenever the input signal exceeds the  
threshold setting. Ratio is adjustable from 1:1 to 20:1 (hard limiting).  
6. Set compressor make-up gain -This control adjusts to make up for apparent loss of gain due  
to compression of the input signals.To view the output of the post-dynamics Audio Group,  
select SOLO in the pre-fader (default) mode.This shows the output level following dynamics  
control and before any effects of theVCA control system (if engaged for this Audio Group).  
The COMP GAIN control should be adjusted to show close to 0dB reference level when nor-  
mal signals are present. The GAIN control has a range of 0dB to +20dB.  
Once set-up is complete, the effects of compressor/limiter action can be viewed on the ATT  
gain reduction meter. This meter shows overall reduction applied by the dynamics system.  
NOTE:When the gate function also is engaged, the meter displays attenuation applied by both  
the compressor and gate functions. However, in most applications, only one function will be  
active at any given moment. Active function is indicated by red illumination of either the com-  
pressor ON/THR LED or the gate ON/THR LED.  
Caution should be exercised in operation of the dynamics system if the ATT meter displays frequent or constant full-  
scale deflections.  
p.133  
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dynamics control  
X-VCA owner’s manual  
7
p.134  
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dynamics control  
9
group section: gate functions  
Each Audio Group also incorporates a "noise gate" function. In live sound applications, this  
feature is most commonly used to eliminate unwanted leakage from surrounding sources  
into on-stage microphones (on drum kits in particular).Although the term "gate" is used here  
for the sake of simplicity, the X-VCA "gate" system actually functions as a downward  
expander. Where a traditional gate is either "on" or "off", a downward expander attenuates  
signal proportionally at descending levels below the threshold point. As a result, downward  
expanders tend to be more forgiving in their characteristics.  
To set up the gate function:  
1.Turn the gate on - Press the GATE switch. The ON/THR LED will light to indi-  
cate gate function is active.  
2. Set the gate threshold - Turn the center knob of the dual concentric THR/RAT  
control to set the input signal level below which gating function will take effect.Gate  
threshold may be set to any level from -20dB to -60dB (and below). The gate  
ON/THR LED lights when input signal drops below the set threshold.  
3. Set the gate ratio -Turn the outer ring of the dual concentricTHR/RAT control  
to set the gates downward expansion ratio. Above the set threshold, signal will be  
tracked at 1:1. Below the threshold, the output signal will be further decreased  
(attenuated) by the ratio selected.  
Once set-up is complete, the effects of the gating function can be viewed on the  
ATT gain reduction meter. This meter shows overall reduction applied by the  
dynamics system.  
NOTE:When the compressor/limiter function also is engaged, the meter displays  
attenuation applied by both the compressor and gate functions. However, in most  
applications, only one function will be active at any given moment. Active function  
is indicated by red illumination of either the compressor ON/THR LED or the gate  
ON/THR LED.  
p.135  
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dynamics control  
X-VCA owner’s manual  
7
p.136  
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dynamics control  
9
output limiter functions  
The X-VCA provides output limiters inserted in the main output circuits following the L/R  
Stereo and Mono master faders.These limiters function with an RMS characteristic, and will  
therefore pass short term program peaks without attenuation or audible signal degradation.  
The X-VCA output limiters are best used for system protection, or to aid the operator in  
keeping within maximum sound levels as set by local noise ordinances.  
To set the output limiters:  
1.Turn the limiter function on - Press the LIMIT ON button to activate the lim-  
iter function.Note that the limiter function affects the respective main outputs only.  
The Alternate, Monitor and Assisted Listening outputs are not affected by the lim-  
iters.  
2. Set the output limiter threshold - Set the control to the input signal level at  
which limiting function is desired. Input signal above the threshold will cause a lev-  
eling of the output signal at a ratio of greater than 20:1. Initial onset of limiting is a  
modified rapid soft-knee characteristic before hard limiting occurs. The threshold  
control may be set for onset of limiting at any output level between -6dBu and  
+20dBu.  
The eight segmentATT output meter displays effect of output limiting. The top seg-  
ment indicates limiter function is ON. The remaining seven segments indicate  
amount of signal attenuation when master bus signal exceeds the set threshold.  
Note: Caution should be exercised if the outputATT meter shows constant atten-  
uation, or significant attenuation at frequent intervals. This could indicate some  
deterioration of the output signal quality.  
Note: EXTREME caution should be observed when turning the limiter function  
off. If the limiter is currently attenuating the output, removing the limiter from the  
circuit could result in a sudden increase in output signal with possible damage to  
speakers.  
p.137  
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power supply  
X-VCA owner’s manual  
8
model 5A power supply  
Matrix  
Expansion  
Matrix 4  
Matrix 3  
Matrix 2  
Matrix 1  
Out  
Out  
Out  
Out  
In  
In  
In  
In  
Ext Mon  
In L  
Insert  
Send  
Insert  
Send  
Insert  
Send  
Ext Mon  
In R  
Return  
Return  
Return  
Mono  
Out  
Right  
Out  
Left  
Out  
Mon  
Out  
L
Mon  
Out  
R
Assist Out  
Alt R Out  
Alt L Out  
DC In  
MIDI  
In  
Out  
p.138  
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power supply  
0
power supply usage  
console and power supply grounding  
Console chassis ground is electrically connected to:the audio ground,pin-  
1 of XLR connectors, the sleeves of 1/4” sockets,and to the terminal CON-  
SOLE GROUND at the rear of the power supply.  
The AC third-wire connection in the power supply cable connects the  
metal chassis of the power supply to safety ground.  
Rack-mounting—the power supply ground may transfer to the rack case  
through the front fixing screws, though this connection is not reliable.  
Sound system use—the grounding requirements may call for the ground  
link to be disconnected.This is permissible only when an alternative ground  
path has been provided.If in doubt seek the advice of an experienced elec-  
trical engineer.  
redundant power supplies  
The console power supply can be considered the single most important  
component in an entire sound system.If a power amplifier,a signal proces-  
sor or a console input goes down in the middle of a show, the show can  
still go on. But if the console loses its power supply, the show is over. For  
this reason, it is always good practice to incorporate redundant power  
supplies for mixing consoles used in professional sound reinforcement  
applications.  
This should be considered a high priority even when using a very reliable  
power supply. In even the most carefully designed sound systems, each  
component runs the risk of failure at sometime or another.  
CrestAudio uses two methods for attaching redundant power supplies to  
consoles. In both methods, the two (or more) power supplies should be  
kept on while the console is in use to insure a smooth transition in the  
event that one shuts off.  
If one power supply drops in voltage or shuts off completely,the other unit  
takes over without any interruptions or audible glitches.As an added pre-  
caution,the two (or more) power supplies can be fed by separateAC lines.  
This will guarantee that the console does not shut off if one of theAC lines  
goes down.  
multiple power supplies in-series  
Crest Audio X-Series consoles use this method for backup. Since each  
power supply includes voltage switching circuitry,more than two units can  
be hooked up in series. A DC link cable ties the power supplies together.  
p.139  
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power supply  
X-VCA owner’s manual  
8
model 5A power supply  
specifications  
output power  
+18V @ 5A DC  
-18V @ 5A DC  
+12V @ 4A DC  
+48V @ 0.75A DC  
two Hirose JR16RK-7S connectors on rear  
connector meets JIS C 5432 standard  
DC out receptacle  
DC out cable  
grey polyurethane outer jacket, 15 feet long  
seven-way, 14-gauge stranded conductors  
rated 600 volts, 80 degrees C  
UL and CSA approved  
Hirose JR16PK-7S and JR16PK-7P connectors fitted  
90 to 250 volts @ 4.5 amps maximum  
universal AC input voltage. No changes needed  
0.5 amps idle  
AC mains power supply  
IEC 320 C-13 3-pin 15 amp receptacle  
removable IEC type  
AC mains receptacle  
cable  
with country-specific mains plug fitted  
UL, CSA, and CE  
approvals  
chassis  
two-space 19 inch rack mount unit  
3.5 inches tall, 17 inches wide, 12 inches deep.  
weight: 18 pounds  
p.140  
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power supply  
0
power supply usage  
supply identification  
The type of power supply can be identified by the model number shown  
on the back of the chassis and panel label.  
power requirements  
The X series power supplies have certain electrical requirements for prop-  
er operation. If possible the power supply should be connected to a dedi-  
cated circuit. Should any other appliance on the same circuit draw enough  
current to overload the circuit, the breaker or fuse will trip causing loss of  
power to the console.  
The power switch on the supply front panel is also a circuit breaker;there  
is no power fuse.Should the supply ever shut down,or trip at start up,sim-  
ply push the switch to the off position and then push on again.  
ground linking  
SAFETY CONSIDERATIONS—each new power supply is shipped with the AC  
third-wire ground connected to the console chassis ground.The connec-  
tion is made at the rear of the power supply unit.This is necessary for safe-  
ty reasons so that exposed metal parts are grounded. In the event of a live  
conductor making contact with the console chassis or the power supply  
chassis then the current will flow to ground without a safety hazard arising.  
Uninterruptible grounding—in a fixed installation for example,make a con-  
nection directly to the console chassis from the safety ground.Disconnect  
the ground link on the rear of the power supply.This disconnects console  
ground from power supply AC third-wire ground which could possibly  
create a hum-loop.  
twin-supply operation  
When twin-supplies are in use for automatic back-up, then the ground  
links on both supplies should be fitted.  
In a situation where the safety ground to the console chassis has been con-  
nected and the ground path via the power supply is causing a hum-loop,  
then disconnect the ground links on both power supplies.  
p.141  
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v. 1.1  
01/25/01  
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