“AutoSwell Light – an automatic volume swell effect triggered by the input signal.
Time: sets the constant time of swell attack.
Sensitivity: defines the response to the input signal. Larger value allows you to detect soft and quiet notes.
Depth: defines an amount of mix of processed signal with initial input. 0 – clean input, 1 – fully processed
Volume: sets overall volume of plugin.”
Source : pecheneg fx