DH_AllpassFilter 1.0

The DH_AllpassFilter SynthEdit module was developed to be a 2-pole allpass filter module.

Inputs:
Input - audio signal

Pitch - controls the filter's "cutoff" - 1 volt per octave. An allpass filter modifies the phase of a signal but has a flat frequency response, so as a practical matter, the Pitch controls the amount of phase shift.

Res - controls the rollover frequency band width.

Outputs:
Output - the filtered signal