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Vintage Simmons Drums (UK) Users Group

Index last updated: 2026-04-28 23:14 UTC

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hello, new

2004-10-06 by gregory zifcak

wow,
i just found this group. i have the sds-800 schematics at home, i'll 
upload them when i have the chance.
i've done loads of modifications to the 800:

-resonance
-waveform selection
-pulse width
-oscillator to filter fm
-second skin frequency control
-run generator to filter freq
-shorter min,longer max decays
-lower filter range
-negative filter envelopes

next is audio inputs to switch in with the noise.

it would be really easy to add cv and gate inputs to use as 4 
independent monosynths. i can upload the cem3394 datasheet as well 
as a schematic for adding all sorts of control inputs to the chip if 
anyone is interested.

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