[sdiy] What type of switch would this be?

Jeff Farr moogah at gmail.com
Wed Nov 9 18:40:37 CET 2005


"Or do it the Oberheim Matrix 1000 way - provide, say, 10 general purpose
modulation paths, each with a big multiplexer to any source, and an
attenuator. Each target only has to mux from those 10 modulation paths,
and you can link a modulator to multiple targets at once."

this is what I am doing, mostly because I want the design to be useable
outside this specific project as well. Using 4 of the AD 16x16 switches I
have 32 destinations which can select from 16 attenuated sources. The
attenuation is done with VCA's and the amount can be controled by a source,
the amount that a source controls the attenuation is attenuated with a
digital pot (yes, this will be a crowded board). Currently I have space for
2 more sources and 12 more destinations. Lin/Exp just made the list, but the
waveform will be selected with a switch (I've got 2 VCO's, 1 switchable VCO
and an LFO). There is still plenty of room for optimization as there are
several routing that are rather dull or create a feedback loop so I havn't
stopped looking at other ways of accomplishing this. Having one 32x32 array
would take the place of at least 3 of the 16x16's, if not all 4.

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