[sdiy] Which programable chip?

[Ian Smith]

Wow, I'm all sorts of stupid that I forgot that the 4051 goes both ways and it can swing +/-5V. 
-Ian

----------------------------------------
> From: gsn10 at hotmail.com
> To: synth-diy at dropmix.xs4all.nl
> Subject: RE: [sdiy] Which programable chip?
> Date: Wed, 15 Apr 2009 16:34:52 -0400
>
>
> Why would you need to run the audio through the processor?
>
> If I'm not mistaken, are you wanting to route one input (of 8 total) to one output (of 8 total)? You can do that with 2 4051 multiplexers, and not have to worry about any ADCs or DACs or high speed processors or anything. You only need to send 6 bits to control everything.
>
> And if you want to be able to route multiple signals simultaneously, it may be slightly more complicated (depending on whether you want arbitrary routings, etc.)- you may need a crosspoint matrix, even 16 4066 chips (or similar), but it's the same basic idea to use analog switches to do the work.


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