Matrix VCF

A multimode filter and VCA built on the filter of the Oberheim Matrix 12, all analogue: sixteen filter types, the Matrix 12's fifteen plus a four pole all pass phaser, picked with the MODE knob or by CV and shown on sixteen LEDs. A P-Vox switch, inspired by the Polivoks, adds resonance distortion and overdrive that drives every mode into rich self oscillation, doubling the filters to thirty two. An output VCA with input and output levels, a peak LED and CV over resonance make a whole voice with a VCO and an envelope.