204D VCF

VCF / Passive Mixer

204D is a voltage controlled low-pass filter, which filters out the higher parts of the sound spectrum, and lets lower frequencies pass through. Based on "transistor ladder" design of Minimoog 204D, with a cut-off slope of -24 dB/octave as in various Moog synthesizers.

Resonance (or Emphasis) is adjustable all the way up to self-oscillation - in this case the filter behaves like a sine wave oscillator with V/Oct tracking up to 4 octaves.

Works as passive 2-channel mixer as well.

3 CV inputs allows complex cutoff modulation.

Handmade with thru-hole components only. Skiff-friendly.

https://machineroom.com.ua/