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Sonic Swell

Envelope follower - generates an amplitude envelope triggered by signal level that is then multiplied by the signal to shape its amplitude. You can think of it as an AutoWah for amplitude.

Parameters:

Sensitivity

Signal level in dB required to trigger the envelope

Attack

Signal level averaging-time in seconds when the signal is coming on ("attack")

Expert Parameters:

Hold Time

Minimum envelope duration in seconds once it has begun

Release Time

Signal level averaging-time in seconds when the signal is going away ("release")