This is basically just a TipTop Z8000 sequencer controlling a Z-DSP module, a Z2040 VCF & a Z5000 VCDSP module. The audio source is a Boss DR-220E Dr.Rhythm, which is also triggering the Z8000 sequencer from its programmable Trig output. Other modules used were a MFB Dual LFO- to change the direction of the sequencer and a Doepfer Dual VCA modulated by two Doepfer VCOs to add a little ring-mod'ish timbre.
A longer 'audio only' clip is also on Soundcloud:
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