Here’s what Schaaf has to say about the jam session:
This is a live studio improvisation Jam. I played the following instruments:
Keystep left: Spectralis
Keystep right black: D550
Keystep right white: DX-7II
Beatstep & Turbo Volcon: MKS-50
The modular synth plays an F on the swarm oscillator. The signal is fed into the RT-451 Filter and from there into the EFFEXX multi effect module.