[sdiy] Patch Routing Idea...

[Paul Maddox]

Peter,

> Or you could put microswitches hidden under the LEDs that make
> a keyboard-matrix. A little push on the LED changes the state of
> the connection (shown by color - simple red LEDs could be used).
> A dark LED show an open matrix point - light shows a closed connection.

Sounds like the Axcel re-synthesiser front end to me (32 by 32 LED switchs)

> And take a matrix circuit for the audio matrix (MT8816 from Mitel or
similar)

nice up to there..
take a close look, they will allow one input to several outputs, but not
several inputs to one output
(or several inputs to several outputs) they also have a low ON resistance
(<50ohms) which means you
couldn't do the CV summing, if you could find one that let multiple inputs
goto multiple outputs AND
that had an on-resistance of about 10K then you'd be talking...

Paul MAddox