The six square wave oscillators are tuned to following fixed frequencies: 119Hz, 176Hz, 214Hz, 303Hz, 363Hz and 666Hz. Each oscillator's volume can be set with an individual potentiometer.
The oscillator mix passes a resonant 12dB/octave lowpass filter that's cutoff frequency can be either controlled by a potentiometer or a voltage.
Cutoff CV input, audio output
3U Eurorack module, 10HP wide, 26mm deep