The Distortion parameters can be used to overdrive the filter input or filter output. The distortion input and output modules are identical, but their different positions in the signal chain—before and after the filter, respectively—result in remarkably dissimilar sounds.
Distortion parameters
Input knob and field: Set the amount of distortion applied before the filter section processes the signal.
Output knob and field: Set the amount of distortion applied after the filter section processes the signal.