Lumanoise 808 Cymbal Drone [duplicate]

Drone generator based on the TR-808's cymbals

Drone generator based on the TR-808's cymbals. It consists of six oscillators, tuned to different fixed frequencies, that go through one common low pass filter.
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.

http://www.schneidersladen.de/en/lep-lumanoise-808-cymbaldronegenerator-euro.html