envelope follower/triggered filter
Featuring:
* Sensitivity control
* Attack and Decay controls
* Range control (can be used to fine-tune the frequency response and create subtle effects)
* Resonance control
* Blend which mixes straight signal with effect creating a whole new palette of sounds.
* Pedal facility (allows the use of a standard passive volume pedal to create wah-type effects)
* FX loop - insert octaves and distortion for some real 70's cheese, or use for external trigger facility
* Up and Down response curves
* High, Low, and Band-pass filter modes
* Four selectable filter frequency ranges
* Triggering off full or half bandwidth and trigger off (useful for instance as a static tone control or for adding or scooping tone with blend)
* LED showing filter response
* LED showing effect on/off