Exploring the Simmons SDS 400

Still full of rust and the re-trigger (run generator) section is not working. Fortunately the four oscillators and all their knobs work fine, with only a little bit of gully in the volume.
This drum synth was released in 1984 as a “percussion system” to complement the SDS 800 “drum kit”. The drums respond to sound and to pulses of +5V.
In this patch, three drums are triggered by Centrevillage Gatem, which receives clock from Minipeg; the fourth voice is a division of this clock, via a BLM CMOS Clock Divider.
The triggers, along with another clock division, also go to one or two midi channels of the Digitone via vpme.de trig31, and using the allocate voice option I send sequences to the four internal tracks at will.