MachineRoom 204D Dual VCF is a dual voltage-controlled low-pass filter, which filters out the higher parts of the sound spectrum and lets lower frequences pass through.
Based on “transistor ladder” design of Minimoog 204D with a cut-off slope of -24 db/octave as in various Moog synthesisers. Resonance (or Emphasis) is adjustable all the way up to self-oscillation with V/Oct tracking up to 4 octaves.
Filter has separate controls for both sections, but can be used for stereo operations as well.