PATCH DYN Compressor

In simple terms, a compressor is an automatic volume control. Loud sounds over a certain threshold are reduced in level; quiet sounds are not reduced. In this way it reduces the dynamic range of an audio signal.

A compressor reduces the gain (level) of an audio signal if its amplitude exceeds a threshold. The amount of gain reduction is determined by a ratio.

For example, with a ratio of 4:1, when the (time averaged) input level is 4 dB over the threshold, the output signal level will be 1dB over the threshold. The gain (level) has been reduced by 3 dB.

When the input level is 8 dB above the threshold, the output level will be 2dB; a 6 dB gain reduction.

A more specific example for a 4:1 ratio:

  • Threshold = 10 dB
  • Input = 14 dB (4 dB above the threshold)
  • Output = 11 dB (1 dB above the threshold)

Settings

in

Audio input gain

out

Audio output gain

AT

Attack time.

RT

Sets how long it takes for the compressor to switch from reduction to a new ready state (release)

ratio

Sets the amount of process.In a normal use, if the Ratio is 3:1, signals 6db above the threshold will come out 2db over the threshold.

thres

Sets the level where the process starts (threshold).

See also

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