TC electronic SDN BHD M3000 - Manual (Page 54)

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Compressor
A Compressor is meant to reduce the dynamic content of the
Input signal, and thereby keep a more constant level. When
the Input signal exceeds the Threshold, the Compressor starts
to reduce the signal according to the ratio. The Ratio
describes how much the signal is reduced, e.g. a Ratio at 2:1
means that for every 2dB the signal exceeds the Threshold,
only 1dB comes out.
COMPRESSOR
Threshold
When the Input level exceeds the Threshold, the Compressor
will be activated. This means that the lower the Threshold,
the more compression you will get.
COMPRESSOR
Ratio
The Ratio of the gain reduction. Example: When the Ratio is
set to 4:1 it means that for every 4dB the Input level rises,
the Output level increases by only 1dB.
Attack
Attack is the amount of time the Compressor uses to reach
the gain reduction specified by the Ratio parameter.
Example: The Input signal rises to 4dB above Threshold in
no time, with the Ratio set to 4:1 and the Attack set to 20ms.
The Compressor will now use 20ms to reach a 3dB gain
reduction - giving you 1dB on the output side for every 4dB
the signal rises above the Threshold point.
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Release
Release sets the fallback time from when the Input signal
falls below Threshold until the Compressor reaches no gain
reduction.
Out Gain
The Gain parameter makes it possible to compensate for the
loss of level in the Compressor. This is also known as
“Makeup” gain.
Out Level
Controls the Output level of the block.
ADDITIONAL EFFECTS - COMPRESSOR