Comp/Limit (Compressor/Limiter) - Ecler DPM3003 Notice D'emploi

5.10.6. COMP/LIMIT (Compressor/Limiter)

Compressor/limiter section offers the necessary dynamics controls to
correctly match maximum output levels and protection needs. Its controls edit
the relative parameters: Compressor/Limiter ON/OFF, THRESHOLD, RATIO,
ATTACK and RELEASE.
 Compressor/limiter ON/OFF switch quickly activates or deactivates all
the section. So it's easy to quickly hear any difference with or without
compressor/ limiter. With OFF (unlighted button), all the section controls
are deactivated.
 THRESHOLD is made of a potentiometer and a linked numerical value to
determine operating signal level for compression (or limitation). This
parameter setting range is from +12dB to -48dB.
 RATIO is also made of a potentiometer and a linked numerical value.
This parameter determines how much the volume is reduced when the
signal level is higher than THRESHOLD. 1:1 value means the signal
level won't change. With an extreme setting like inf:1 it operates as a signal limiter and any signal
higher than THRESHOLD will be maintained at this threshold level.
 ATTACK (potentiometer and numerical value) determines how fast the compressor/limiter reacts
and changes output volume once the THRESHOLD level has been reached. Its setting range is
from 0.1 ms to 150 ms.
 RELEASE (potentiometer and numerical value) determines how long it takes for the
compressor/limiter output volume to return to unity gain once the signal level has dropped under
the THRESHOLD. In this case, the setting range is from 1 ms to 5 seconds.
Correctly setting compressor's ATTACK and RELEASE parameters is not an easy task: too low
values result in excessive low frequency distortion and too high values could make a limiter useless if
damages already occurred when limitation starts.
In order to help you correctly setting these values, the AUTO parameter automatically set them
using the crossover high-pass filter cut-off frequency.
When the AUTO parameter is activated, ATTACK and RELEASE controls are deactivated for
editing, but still display the last used value.
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