Here's our first Voltage-Controlled Variable Filter, inspired by the original MS-20 filter.
This module features:
.Two independent filters, a High-Pass and a Low-Pass with dedicated audio inputs and outputs.
.Besides individual outputs the HP and LP are also sent to a voltage-controlled Mix between the HP and LP filters.
.Both Cutoff and Resonance are voltage-controlled with dedicated cv attenuator pots.
.Switch for selecting between normal cutoff behaviour and an adjustable Smooth circuit to simulate a vactrol behaviour for cutoff control.
.Switch for setting filters Filters in Parallel (independent) or Series (HP > LP).
.Inspired by the Oscar synthesizer we added a Coupling switch to tie the HP Cutoff control to the LP Cutoff control, in this case the LP cutoff controls act as an offset from HP setting.
.Three position switch selects different resonance clipping paths: diodes / no clipping / leds.
.Both filters features a post Distortion/Fuzz circuit that adds extra harmonics adds an even deeper growl or extra gritiness to it.
.All audio outputs (HP, Mix, LP) feature a switch for choosing phase output, allowing additive or subtractive mixes.
.Three Leds monitor the amplitude of the three outputs (HP, Mix, LP).
HD video, full screen highly recommended.