VocoPro CLG-600 Musical Instrument User Manual


 
8
Front Panel Description and Controls (cont.)
4. IN/OUT button - This switch enables you to quickly
hear the CLG-600 compressor/limiter IN or OUT of the
audio chain. When the switch is in the OUT position,
all limiting and compression controls and functions
are bypassed, with the exception of the gain and
output controls, which continue to function as
straightforward level controls.
5. THRESHOLD control - The THRESHOLD control
has a range of -40dB to +20 dB, allowing applications 
from low level compression to high level limiting. The 
THRESHOLD control determines the audio level above 
which GAIN REDUCTION occurs. When the 
THRESHOLD LED comes on, that means that GAIN 
REDUCTION is beginning to occur, due to input signal 
peaks exceeding the selected threshold in dB.
6. RATIO control - This control determines the RATIO 
of change in output level to changes in input level
for all signals above threshold. The numbers printed 
around the RATIO control are calibrated in dB and 
indicate the increase in input (above threshold) 
required to produce a 1db increase in output. This 
can be expressed conveniently as a ratio. If the 
output remains constant no matter how high the 
input level, we have an infinite input/output ratio.
NOTE: It should be remembered that the RATIO
control has no effect on signals which are below
threshold. There is a common but incorrect
notion that limiting always implies the use of an
infinite ratio. Although there are times when an
infinite ratio is desirable, there will be situations 
where infinite, or "hard", limiting action is neither
appropriate nor necessary.
7. ATTACK control - ATTACK controls how fast the 
compressor reacts to signals passing over the 
threshold point. The available range is from 0.1 to 
200 ms. This control when used correctly creates 
either a smooth or abrupt signal process.
8. RELEASE control - The RELEASE control 
determines how fast or slow a compressed 
segment returns to its original volume. The 
available range is from .05 to 4 seconds. This 
control when used correctly creates either a 
9. AUTO/MANUAL switch - By activating the AUTO 
switch to the ON position, the attack and release 
controls are handled by the CLG-600 
automatically. When it is set to the MANUAL 
position, the attack and release controls will 
adhere to settings of the controls in place. This 
allows for unobtrusive musical compression with 
widely varying dynamics to occur without 
"manning" the sound system.
10. OUTPUT LEVEL control - OUTPUT Level control 
is provided to fully cut or restore up to -/+ 20 dB 
of system gain. For unity gain, set the control to 0. 
NOTE: When the unit is in the BYPASS mode the 
output control still functions.
11. GAIN REDUCTION meter - This 8-stage LED 
meter indicates the actual GAIN REDUCTION 
processing level and displays this in range
of 0-30 dB.
12. LEVEL EXPANSION meter - This 8-stage meter 
indicates the actual LEVEL EXPANSION level and 
displays this in a range of -30dB to +6dB.
LEVEL
THRESHOLD
dB
MANUAL
AUTO
COMPRESSOR/LIMITER
RATIO
M1
RELEASE
Sec
OUPUT
dB
CH 1
30 27 24 21 18 15 12 9 6 4 2 1
GAIN
OUT
-30 20 -10 -5 -3 0 +3 +5
+20
+10
0
-10
-20
-30
-40
2.5
1
1.5
8
200
2.5
0.1
4
.05
0.5
-20 +20
0
OFF
msec
IN
4
5
6
7
8
9
10
11
12