The 4HP CZ-VCO module is a phase distortion oscillator in a 4HP module.
It replicates the famous PD waveform and can make resonant sweeps without a filter.
Based on the CZ-1 chip (http://www.dspsynth.eu) it features a 1V/Octave pitch input with a 5 octave range and a modulation index CV input with a range of 0.125x – 16x. Both inputs have an attenuator knob doubling as a parameter dial when the CV’s are not plugged in.
It also has a simple Gate VCA input that enables it to be used as a complete synth if you don’t have any EG and VCA modules, i.e with an analog sequencer it will perform as an acid box.
Available as pre built and DIY kit modules.