The filters of the Dual State Variable VCF are identical in design. Per instance, there is an audio input with level control as well as potentiometers plus CV connectors for cutoff and resonance parameters. The modulation intensity of the control voltage channels can be adjusted via bipolar attenuators. In addition, each of the filters features a 1v / octave input, allowing the circuits to be played like sine oscillators while self-oscillating. On the output side, there are four sockets per VCF, which emit high-pass, band-pass, notch and low-pass signals. An extraordinary feature known from the Oberheim SEM: The notch characteristic can be blended into high-pass or low-pass.
The VCF’s signal flow is determined by two switches. With the first control element, users can wire both circuits in parallel or in series. The second switch decides whether the band-pass or notch output of filter A is fed to filter B.
Audio and CV inputs of both filters are normalized. The cutoff frequencies of the VCFs can be edited simultaneously via the Cutoff A/B potentiometer.
Four filter outputs: High-pass, band-pass, notch, low-pass
CV inputs for cutoff and resonance
1v / octave input
3U Eurorack module, 26 HP wide, 22 mm in depth
Power consumption: 53 mA at +12 V and 50 mA at -12 V