Nady Systems Stereo Amplifier dig comp 16 User Manual

DigiComp16booklet 1/23/03 10:26 AM Page 2  
SERVICE FOR YOUR NADY AUDIO PRODUCT  
(U.S.) Should your NADY AUDIO product require service, please contact the  
Nady Service Department via telephone at (510) 652-2411, or e-mail at  
(International) For service, please contact the NADY AUDIO distributor in your  
country through the dealer from whom you purchased this product.  
O W N E R ’ S M A N U A L  
DO NOT ATTEMPT TO SERVICE THIS UNIT  
YOURSELF AS IT CAN BE DANGEROUS AND  
WILL ALSO VOID THE WARRANTY.  
DigiComp 16  
NADY SYSTEMS, INC. • 6701 SHELLMOUND STREET, EMERYVILLE, CA 94608  
Tel: 510.652.2411 • Fax: 510.652.5075 • www.nady.com  
18-bit Digital Compressor  
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DigiComp16booklet 1/23/03 10:26 AM Page 6  
Block Diagram  
Contents  
Warning ..................................................................4  
Preset Function Descriptions  
Stereo AGC ..........................................................12  
Dynamic Compression Process............................13  
Stereo 2 Bands Compressor ................................13  
Stereo 2 Bands Compressor Preset ....................14  
Mono 2 Bands + 5 Bands Eq Compressor ..........15  
Mono 2 Bands + Bands Eq  
Installation  
Inspection................................................................5  
Desktop Use ..........................................................5  
Rackmount..............................................................5  
Compressor Presets ............................................16  
Compression Effects Summary Table ..................16  
Front Panel Controls  
Input Level Control ................................................6  
Output Level Control ..............................................6  
Process Bypass Switch ..........................................6  
Peak LED................................................................6  
Power LED..............................................................6  
Program Select Control ..........................................6  
Variations Select Control ........................................6  
Block Diagram ....................................................18  
Specifications......................................................19  
Service ....................................................Back Cover  
Rear Panel Connections  
Power Jacks............................................................7  
Bypass Jacks..........................................................7  
Input (Left/Mono &Right) Jacks ..............................7  
Output (Left & Right) Jacks ....................................7  
Installation and Connection  
Audio Connections and Power Up..........................8  
Analog ....................................................................8  
a. Input Jack Wiring ..........................................8  
b. Level Setting ................................................8  
c. Compression Process Bypass......................9  
Installation ..............................................................9  
a. Standard Use................................................9  
b. Application Examples ..................................9  
18  
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DigiComp16booklet 1/23/03 10:26 AM Page 8  
Warning  
An equilateral triangle enclosing a lightening flash/arrowhead symbol is  
AGC  
intended to alert the user to the presence of uninsulated dangerous  
voltagewithin the products enclosure which may be of sufficient  
magnitude to constitute a risk of electric shock.  
EXP SPEED CMP SPEED  
EXP THR  
(dB)  
-61  
-34  
-42  
-34  
-44  
-44  
-37  
-37  
-37  
-37  
-44  
-44  
-42  
-34  
-61  
CMP THR  
(dB)  
-26  
-29  
-26  
-29  
-29  
-29  
-29  
-22  
-27  
-27  
-27  
-27  
-27  
-27  
-27  
THR HOLD EXP RATIO  
ATTENTION: RISQUE DE CHOC ELECTRIQUE NE PAS OUVRIR  
(dB/s)  
3.5  
3.5  
3.5  
4
3.2  
3.3  
3.2  
4.1  
4.1  
4.5  
4.5  
5.6  
6
(dB/s)  
23  
19.5  
19.5  
24  
(dB)  
-44  
-32  
-38  
-31  
-31  
-42  
-33  
-31  
-31  
-30  
-29  
-42  
-31  
-30  
-32  
(In:Out)  
1:2  
1:2  
1:2  
1:2  
1:2  
1:2  
1:2  
1:2  
1:2  
1:2  
1:2  
1:2  
1:2  
1:2  
1:2  
An equilateral triangle enclosing an exclamation point is intended to alert  
the user to the presence of important operating and service instructions in  
the literature enclosed with this unit.  
AGC 1  
AGC 2  
AGC 3  
AGC 4  
AGC 5  
AGC 6  
AGC 7  
AGC 8  
AGC 9  
AGC 10  
AGC 11  
AGC 12  
AGC 13  
AGC 14  
AGC 15  
IMPORTANT SAFETY INSTRUCTIONS  
24  
22.5  
24.3  
23  
When using this electronic device, basic precautions should always be taken, including the following:  
1. Read all instructions before using the product.  
23  
2. Do not use this product near water (e.g., near a bathtub, washbowl, kitchen sink, in a wet  
basement, near a swimming pool, etc.).  
24.3  
22.5  
24  
19.5  
19.5  
23  
3. This product should be used only with a cart or stand that will keep it level and stable and prevent  
wobbling.  
6
6
4. This product, in combination with headphones or speakers, may be capable of producing sound  
levels that could cause permanent hearing loss. Do not operate for a long period of time at a high  
volume level or at a level that is uncomfortable. If you experience any hearing loss or ringing in the  
ears, you should consult an audiologist.  
EQ CLASSIC PRESET  
5. The product should be positioned so that proper ventilation is maintained.  
PEQ 1  
PEQ 2  
PEQ 3  
PEQ 4  
PEQ 5  
6. The product should be located away from heat sources such as radiators, heat vents, or other  
devices (including amplifiers) that produce heat.  
Classic 1  
Classic 2  
Classic 3  
Classic 4  
Classic 5  
Classic 6  
Classic 7  
Classic 8  
G=1dB; F=75Hz  
Q=1  
G=1dB; F=75Hz  
Q=1  
G=1dB; F=75Hz  
Q=5  
G=2dB; F=50Hz  
Q=5  
G=1dB; F=75Hz  
Q=1  
G=1dB; F=75Hz  
Q=1  
G=1dB; F=75Hz;  
Q=5  
G=2dB; F=50Hz;  
Q=5  
G=0dB  
G=0,5dB;  
F=1KHz; Q=1  
G=-1dB; F=1KHz  
Q=1  
G=-1dB; F=1KHz  
Q=1  
G=-6dB;F=1KHz;  
Q=1  
G=-1dB;F=1KHz  
Q=1  
G=0.5dB; F=1KHz  
Q=1  
G=-1dB; F=1KHz  
Q=1  
G=-6dB; F=1KHz;  
Q=1  
G=-0dB  
G=1dB; F=12KHz  
Q=1  
7. The product should be connected to a power supply only of the type described in the operating  
instructions or as marked on the product. Replace the fuse only with one of the specified type, size,  
and correct rating.  
G=-1dB;  
F=600Hz; Q=5  
G=-1dB  
F=600Hz;Q=5  
G=-10dB;  
F=100Hz; Q=5  
G=-1dB;  
F=600Hz; Q=5  
G=0dB  
G=1dB;  
G=-1dB;  
F=3.7KHz;Q=5 F=12KHz;Q=1  
G=-2dB;  
F=3.7KHz;Q=5  
G=-4.5dB;  
F=3.7KHz;Q=1  
G=1dB;  
G=1dB; F=7KHz  
Q=5  
G=2dB;F=10KHz  
Q=5  
8. The power supply cord should: (1) be undamaged, (2) never share an outlet or extension cord  
with other devices so that the outlets or extension cords power rating is exceeded, and (3) never be  
left plugged into the outlet when not being used for a long period of time.  
G=-1dB;  
9. Care should be taken so that objects do not fall into, and liquids are not spilled through, the  
enclosures openings.  
F=3.7KHz; Q=5 F=12KHz; Q=1  
G=0dB  
G=1dB; F=12KHZ  
Q=1  
G=1dB; F=7KHz;  
Q=5  
10. The product should be serviced by qualified service personnel if:  
G=-1dB  
F=600Hz; Q=5  
G=-10dB;  
G=-2dB;  
F=3.7KHz; Q=5  
G=-4.5dB; G=2dB; F=10KHz;  
F=3.7KHz; Q=1 Q=5  
A. The power supply cord or the plug has been damaged.  
B. Objects have fallen into, or liquid has been spilled onto the product.  
C. The product has been exposed to rain.  
F=100Hz; Q=5  
D. The product does not appear to operate normally or exhibits a marked change  
in performance.  
E. The product has been dropped, or the enclosure damaged.  
11. Do not attempt to service the product beyond what is described in the user maintenance  
instructions. All other servicing should be referred to qualified service personnel.  
4
17  
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DigiComp16booklet 1/23/03 10:26 AM Page 10  
Installation  
This type of dynamic process is very useful for the dynamic control of instruments or  
singlesounds.  
To ensure years of enjoyment from your NADY AUDIO DigiComp 16 sound processor,  
please read and understand this manual thoroughly before using the unit.  
Mono 2 Band + 5 Bands EQ Compressor Presets  
There are 8 presets available using the above algorithms:  
INSPECTION  
Your DigiComp 16 was carefully packed at the factory in packaging designed to protect  
the units in shipment. Before installing and using your unit, carefully examine the  
packaging and all contents for any signs of physical damage that may have occurred in  
transit.  
1) Classic 1  
3) Classic 3  
5) Classic 5  
7) Classic 7  
2) Classic 2  
4) Classic 4  
6) Classic 6  
8) Classic 8  
(Note: Nady Systems is not responsible for shipping damage. If the unit is damaged in  
shipping, do not return to us, but notify your dealer and the shipping company  
immediately to make a claim. Such claims must be made by the consignee in a timely  
manner.)  
These are all designed for use with single instruments. These presets are well tailored  
for use on classic guitars or acoustic instruments, where different equalizations of the  
sound (ranging from bright equalizations to warmer ones) can give the instruments more  
or less character and deepness.  
CONTENTS:  
DigiComp 16 (verify that the same serial number is the same as shown on  
shipping carton)  
Compression Effects Summary Table  
AC Power supply adapter  
Instruction manual  
Warranty Card  
LIMITER  
Band Split (Hz)  
Limiter Low  
Volume Low  
Volume High  
Band (dB)  
Band (dB)  
Band (dB)  
AGC PURE  
ACOUSTIC  
MASTER  
CLEAN  
DANCE  
KICK DRUM  
MIX DOWN  
JUMP UP  
800  
2500  
630  
3150  
160  
250  
5000  
1250  
0
-2  
-2  
0
2
4
0
6.5  
8
0
6.5  
-4.5  
5
2
2.5  
2
DESKTOP USE  
The DigiComp 16 may be placed anywhere safely as needed where it will not fall or be  
possibly damaged. Attach the rubber feet provided to the bottom of the unit if the unit is  
placed on a surface you wish to protect.  
-3  
-1.5  
-1.5  
-3  
(Note: The DigiComp 16 itself doesn’t generate any magnetic or hum fields, but it may  
pick up hum or noise from fields generated by power amplifiers. If it does, re-position the  
unit to eliminate the noise. Since the DigiComp 16 adapter may generate hum fields,  
locate it away from other audio equipment or wiring as much as possible.)  
2
2
-1  
4
COMPRESSOR  
Threshold (Hz)  
Release (dB/s)  
Attack (dB)  
AGC PURE  
ACOUSTIC  
MASTER  
CLEAN  
DANCE  
KICK DRUM  
MIX DOWN  
JUMP UP  
CLASSIC  
1,2,3,4,5,6,7  
0
-2  
-2  
2.5  
-1.5  
-0.5  
-2  
-1.5  
-6  
-
-
RACK MOUNTING  
33  
34  
30  
50  
86  
32  
57  
6.5  
111  
29  
111  
72  
137  
25  
72  
The DigiComp 16 has single rack height, and up to three DigiComp 16s may be  
mounted side-by-side in a standard universal 19equipment rack available from rack  
manufacturers or your music dealer.  
85.6  
16  
5
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DigiComp16booklet 1/23/03 10:26 AM Page 12  
Front Panel Controls  
(3)  
(7)  
(6)  
brilliance. It is well suited for processing dynamic and brilliant recordings, increasing their  
"punch".  
6) Kick Drum: In this preset, mid-low range is emphasized, while high and mid  
frequencies are slightly attenuated. This special preset is extremely well suited for drum  
recordings. It is ideal for underlining drumslow range in multitrack recordings or mixed  
microphone environments.  
7) Mixdown: Mixdown is less brilliant than Clean Preset and mid-low end is more  
pronounced. This is ideal for underlining bass and drums without losing definition in the  
rest of the range. This preset is also suited for harmonically complex instruments, e.g.  
double bass, which have a non-negligible high frequency range.  
9) Jumping Up: The Jumping Up Preset is quite similar to Clean Preset in its general  
timbre, but this preset is particularly effective with male voices and is capable of  
maintaining the level in soft passages of a music program. For female voices, the Clean  
Program is generally preferred.  
(1)  
(2)  
(4)  
(5)  
Before using the DigiComp 16, it is best to familiarize yourself with the functions of all the  
controls and connections. After you have set up your unit, you should refer back to these  
descriptions to fully optimize operation in your paticular application.  
Mono 2 Bands+ 5 Bands EQ Compressor  
(1) Input Level Control  
The DigiComp 16s Mono 2 Bands +5 Bands EQ dynamic process algorithm is based on  
a "multi-band" process concept, splitting the full band signal entering the dynamic  
process algorithm into 2 "sub-bands" the low frequencies band and the mid/high  
frequencies band. This enables differentiation of the dynamic processes operating on the  
low frequencies (with higher energy content) and on the mid/high frequencies (with lower  
energy content). This technique avoids the common "pumping" effect which often occurs  
when applying a dynamic process to a sound signal.  
Once the input signal is split into 2 "sub-bands", the DigiComp 16 operates a first limiting  
process on the low frequencies band, and then, once the full band, is restored, it applies  
a powerful stereo dynamic process on the two "recombined" channels.  
The input signal to the dynamic compression "block" is the sum of the input signals  
filtered with a 5 bands parametric EQ.  
The input level control sets the main input gain, before the signal reaches the input bus.  
It controls both Left (MONO) and Right input levels simultaneously.  
(2) Output Level Control  
The output level control sets the level going to the amplifer or mixer from this apparatus.  
(3) Process Bypass Switch  
This switch allows you to bypass the digital process to have the input signal available on  
the outputs.  
(4) Peak LED  
This displays the signal level being processed by the DigiComp 16. If the signal level is  
at overload, this LED will light red continuously and you might begin to hear the signal  
distort. Back off the INPUT CONTROL (1) until the LED lights only occasionally.  
(5) Power LED  
This is lit whenever the DigiComp 16 power adapter is plugged in.  
(6) Program Select Control  
The Program select knob is used to choose the program you wish to activate.  
(7) Variations Select Control  
Each program on this apparatus has the AGC parameter which can be adjusted by  
means of this knob.  
This feature allows you to modify the "color" of the input signal before applying the  
dynamic process.  
6
15  
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DigiComp16booklet 1/23/03 10:33 AM Page 14  
Rear Panel Connections  
This technique helps avoid the common "pumping" effect which often arises when  
applying a dynamic process to a sound signal.  
(10)  
(11)  
(12)  
(9)  
(13)  
Once the input signal is split into 2 "sub-bands", the DigiComp 16 operates a first limiting  
process on the low frequencies band, and then, once the full band, is restored, it  
applies a powerful stereo dynamic process on the two "recombined" channels.  
(8)  
(8) Power Jack  
This is a plug for connecting the Nady 9VAC power supply adapter (supplied).  
The DigiComp 16 comes with a power adapter suitable for the voltage of the country it is  
shipped to (either 110 or 220V, 50 or 60Hz).  
(Note: The correct power supply must be used AT ALL TIMES — any other power supply  
might create a fire risk and/or permanently damage your unit. This damage would NOT  
be covered under your warranty.)  
This type of dynamic process is very useful for the dynamic control of complex audio —  
a CD, an orchestra, etc.  
Stereo 2 Bands Compressor Presets  
(9) Bypass Jack  
1) AGC pure: This preset is a simple automatic level control. Its speed varies with the  
different "variation" control positions. From a timbre point of view, it's a rather neutral  
process, and it doesn't alter the general balance of the original signal. It simply keeps  
the level in proximity of a fixed level, correcting the source variations. Note that variation  
1 disables the AGC — it does so even in the compressor presets. This variation can be  
considered a sort of bypass.  
2) Acoustic: The general impression this preset gives is of definition and power. The  
timbre is lively and brilliant, ideal for small ensemble music and keeping live soft  
passages. Frequency response is slightly rolled off in the low end.  
This is a 1/4” phone jack for connecting to an effects bypass footswitch. You can bypass  
the effects in two ways, thus allowing the direct signal to pass through the DigiComp 16  
unchanged:  
• By pressing the PROCESS BYPASS SWITCH (3), or by connecting a footswitch to this  
jack and pressing the footswitch. Each time this footswitch is pressed, the Bypass mode  
will turn on and off alternately.  
(10) & (11) Output (Left & Right) Jacks  
3) Master: Master is very neutral and is usable as a high performance AGC. It can be  
put before power amps and recorders in order to optimize their dynamic range. Timbre is  
very similar to original signals, and so the unique appreciable differences are in the  
dynamic range corrections. Variations 2 through 16 activate even the AGC to enable  
variable compressor action.  
4) Clean: This is a high definition preset, providing great brilliance and dynamic  
impression. Nevertheless it is never fatiguing and "pushes" the sound without  
unbalancing it. Highs and the punch range are emphasized and lows are not overly  
attenuated. It is great for underlining details in female vocals.  
These 1/4” unbalanced phone jacks connect to devices such as the effects returns,  
channel inputs or inserts on a mixing console, or power amplifier inputs. For mono  
applications, use the LEFT (10) output.  
(12) & (13) Input (Left/Mono & Right) Jacks  
These 1/4” unbalanced phone jacks connect to sources such as the effects sends of  
mixing consoles. They may be used with nominal input levels from -8/9dBV. The  
Left/Mono input jack is normal to the Right jack. This means that when nothing is  
plugged into the RIght input jack, the signal present at the Left/Mono input is routed to  
the Right as well.  
5) Dance: With this program, medium range and mid-low range are emphasized, while  
high frequencies are slightly attenuated. This helps control dance music’s intrinsic  
14  
7
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DigiComp16booklet 1/23/03 10:33 AM Page 16  
Installation and Connection  
Audio Connections and Power Up  
The connections between the DigiComp 16 and other audio devices have to be made  
using high-quality cables to insure optimum performance of this unit. It is best to use low  
capacitance shielded cables with a flexible internal conductor. Connect the cables to the  
unit properly by observing the following precautions:  
• Do not bundle audio cables with AC power cords.  
• Do not place audio cables and DigiComp 16 near sources of electromagnetic  
interference such as transformers, monitors, computers, etc.  
Dynamic Compression Process  
As the name implies, compression reduces the dynamic range of a signal. It is used  
extensively in audio recording, production work, noise reduction, and live performance  
applications, and needs to be used with care. A compressor is basically a variable gain  
device wherein the amount of gain used depends on the level of the input. In this case,  
the gain will be reduced when the signal level is high, making louder passages softer  
• Always unplug cables by firmly grasping the body of the plug and pulling directly  
outward.  
• Do not place cables where they can be stepped on.  
• Avoid twisting a cable or having it make sharp, right angle turns. Before powering up  
the DigiComp 16, check that all connections have been made correctly.  
• Turn down volume controls of the amplifier or mixer. Insert the Power plug into the  
POWER input on the rear panel of the DigiComp 16 and plug the power adapter into  
an AC outlet. Turn on the power of the amplifier/mixer and adjust the volume.  
and reducing the dynamic range.  
Analog  
a. Input Jack Wiring  
The DigiComp 16’s LEFT INPUT (12) jack is also the mono input for the unit. If you only  
connect a single mono cable to the LEFT INPUT (12) jack, it will also be routed  
automatically to the RIGHT INPUT (13). However, if you are using stereo input signals  
and also connecting a cable to the RIGHT INPUT (13) jack, the automatic routing will be  
avoided and the left input cable will feed only the LEFT INPUT (12), and the right input  
cable will feed only the RIGHT INPUT (13).  
b. Level Setting  
Proper setting of the input and  
output levels is crucial in order  
to achieve the maximum  
signal-to-noise ratio. It is  
usually best to set both input  
and output level controls at 3/4  
or 75% of maximum. This will  
A compressor’s input/output relationship can be illustrated by a simple graph:  
The horizontal axis corresponds to the input signal level, and the vertical axis is the  
output level (both measured in decibels). A line at 45 degrees corresponds to a gain of  
one — any input level is mapped to exactly the same output level. The compressor  
changes the slope of that line (makes it more horizontal) above some value called the  
threshold (which is most often adjustable). The height of the line defines the dynamic  
range of the output, and the slope of the line is the same as the compressor's gain.  
decrease the possibility of  
overload distortion and keep  
Stereo 2 Bands Compressor  
the amount of background noise to a minimum. If the Signal LED (4) on the DigiComp 16  
lights up, signaling a process saturation, turn down the INPUT LEVEL (1) or decrease  
the volume of the source (instrument, mixer send, etc.). If the unit level is causing the  
mixer or amp to distort, turn the OUTPUT LEVEL (2) down.  
The DigiComp 16’s Stereo 2-bands dynamic process algorithm is based on a  
"multiband" process concept, splitting the full band of the input signals into 2  
"sub-bands" — the low frequencies band and the mid/high frequencies band — in order  
to differentiate the dynamic processes operating on the low frequencies (with higher  
energy content) and the mid/high frequencies (with lower energy content).  
8
13  
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DigiComp16booklet 1/23/03 12:50 PM Page 18  
Preset Functions  
c. Compression Process Bypass  
Stereo AGC  
At any time you can bypass the process, thereby allowing the direct signal to pass  
through the DigiComp 16 unchanged. This can be done in two ways:  
• By pressing the BYPASS switch (3)  
• By connecting a footswitch to the BYPASS jack (9) and pressing the footswitch. On the  
back panel you will find a footswitch jack labelled BYPASS. This is a mono jack with  
connections for a standard footswitch. The footswitch must be plugged in before the  
DigiComp 16 has its power turned on — the DigiComp 16 will automatically recognize  
the right “polarity” of the pedal.  
The DigiComp 16’s dynamic process algorithm also includes a stereo Automatic Gain  
Control (AGC) "block" that, if used, is able to maintain almost stable the mean amplitude  
of the input signal, increasing it when the "average"of the input signal amplitudes seems  
to be low and decreasing it when the "average" of the input signal amplitude seems to be  
too high. This process is useful when the sound reaching the input of the DigiComp 16 is  
coming from different sources having different output levels and it is necessary to  
"NORMALIZE" the input level of the DigiComp 16 to obtain better performance from the  
Installation  
a. Standard Use  
The DigiComp 16 may be placed anywhere — on a table, on top of an amp, next to a  
mixing console. If it will be on furniture, use the rubber feet provided for the bottom of the  
unit. Make sure to place the unit’s power supply away from other audio equipment that  
may induce fields, and away from the signal wiring. It is possible that the DigiComp 16  
may pick up noise fields generated by other equipment such as a large power amplifier.  
In this case, move the unit until the noise goes away.  
b. Application Examples  
Line Instrument — When connecting audio cables and/or turning power on and off, make  
sure that all devices in your system have their volume controls turned down. The  
DigiComp 16 has two 1/4” unbalanced inputs and two 1/4” unbalanced outputs. This  
input/output configuration may provide three different audio connection options:  
dynamic process operating as "second block" of the algorithm.  
1) Expander Speed: This parameter represents the speed at which the signal is  
expanded beyond the Expander Threshold. This occurs only if the Max value is different  
from 0dB.  
2) Compressor Speed: This parameter represents the speed at which the signal is  
compressed once it goes beyond the Compressor Threshold. This occurs only if the Min  
value is different from 0dB.  
3) Expander Threshold: This is the threshold beyond which the signal is expanded.  
4) Compressor Threshold: This is the threshold beyond which the signal is  
compressed.  
• Mono  
Connect an audio cable to the LEFT INPUT (12) of the DigiComp 16 from a mono  
source, and another audio cable from the LEFT OUTPUT (10) of the DigiComp 16 to an  
amplification system or mixer input.  
5) Hold Threshold: When this threshold is crossed by the signal level, coming from the  
compression region, the compression coefficient is maintained steady. When the  
crossing is from the expansion region, the expansion coefficient is kept the same.  
6) Max: This is the maximum expansion ratio between input and output in the expansion  
region.  
From Instrument or  
Effect Send  
7) Min: This is the maximum compression ratio between input and output in the  
compression region. The AGC = Const. areas are regions in which the multiplying  
coefficient value assumes the last calculated before crossing the different thresholds, so  
in the expansion area the COEF AGC value is increasing, while in the compression area  
the COEF AGC value is decreasing.  
To Mixing or Amplifier  
Console  
12  
9
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DigiComp16booklet 1/23/03 12:01 PM Page 20  
• Mono In, Stereo Out  
While still using the LEFT (12) mono input, connect two audio cables from the LEFT (10)  
and RIGHT (11) OUPUTS of the DigiComp 16 to a stereo amplification system or two  
mixer inputs.  
Insert jacks on the back of a mixer provide a way of "inserting" external processing  
equipment into the signal path. The insert occurs after the input amplifier, and before the  
channel fader; essentially it is the same as connecting the source (instrument or mic)  
into the DigiComp 16 before the mixer's channel input. Usually, insert connections  
require a special, stereo-splitting Y-cord. This Y-cord has a stereo 1/4” TRS jack that  
plugs into the mixer's channel insert socket, and two mono 1/4” TRS jacks (input and  
output) that will plug into the DigiComp 16. This kind of adapter cord will virtually insert  
the compression processing into one mixer's channel. Carefully adjust the DigiComp 16  
input and output levels in order to satisfy the dynamic requirements of both the  
processed channels. If you don't hear anything, try to swap the Input and Output ends of  
the TRS cable plugged into the DigiComp 16. Do not use the effects send/return  
connections found on most mixers for effect modules, as this could result in heavy  
frequency response alterations.  
• Stereo  
Connect two audio cables to the LEFT (12) and RIGHT INPUTS (13) of the DigiComp 16  
from a stereo source, and two other audio cables from the LEFT (10) and RIGHT (11)  
OUPUTS of the DigiComp 16 to a stereo amplification system or two mixer inputs.  
Mono In  
If you only want to use the DigiComp 16 for a mono input signal and to connect both of  
its outputs back to the mixer, you will need three audio cables. Connect a channel insert  
from the console to the LEFT mono input of the DigiComp 16 via TRS, and another  
audio cable from the LEFT or RIGHT output of the DigiComp 16 to an adjacent mixer  
input.  
Interfacing to a Mixing Console — The DigiComp 16 can accept mono or stereo sends  
at all system levels. The input circuitry of the DigiComp 16 can easily accept  
professional +8/9 dBu levels while having enough input and output gain to interface with  
the low signal levels of home recording systems. The DigiComp 16 may be connected to  
a mixing console connecting the unit directly to the channel insert socket of a single  
channel that is to be processed. Another way of interfacing the DigiComp 16 to a mixer  
or recording console would be in-line between the output of the mixing console and the  
input of a tape deck or power amplifier. This last setup would be used only if you wanted  
to process the entire mix.  
Stereo In - Stereo Out  
This connection is similar to the one described above. However, by utilizing two TRS  
cables and the console channel inserts, you can process two signals or a stereo signal  
(e.g., from a keyboard). This operational mode is the one used with the algorithms (1 to  
8), designed to process audio stereo sources such as CD’s. Improper level setting when  
using a dynamic processor is the most common cause of noise and distortion problems,  
so always be careful to ensure optimum audio.  
Using Inserts — In the figure below, the situation is described in which the DigiComp 16  
applies the desired dynamic process to single instrument signals; in this case, you must  
use a mixer that features individual channel inserts.  
10  
11  
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