Two triangle oscillators make phasing drone sounds. They are then hard-switched by a fast squarewave clock. This third oscillator can also be set in the same phase as the other two oscillators, which will make the sound much fatter. When set to higher frequencies, the analog switch adds metalic and screaming harmonics to the sound. The signal is then routed into a lowpass filter, to shape the sound and make cool sweeps.
You have control over the two pitches of the main oscillators, the clock frequency and the filter cutoff.
Sounds vary from deep rumbling drones to phasing screaming lead sounds.