Dual Prophecysound Rubber Fetish envelope filter

A dual-channel Prophecysound Rubber Fetish envelope filter.
Channel one is low-pass only, and has the following controls:

  • gain (signal volume through filter section)
  • sensitivity (response to playing dynamics)
  • peak / Q
  • range
  • range up / down switch
  • start point for down drive
  • effect / clean signal blend

Channel two is low pass / band pass / high bass switchable, with all the controls of channel one plus:

  • frequency tune (max setting -> normal, turn down to tune resonant peak through lower frequencies; also increases gain for some nice gritty sounds)
  • attack / decay

Two footswitches - bypass and channel select. LEDs indicate which channel is selected and turn off when effect is bypassed.