[sdiy] Audio converters for DC?

Jay Schwichtenberg jschwich53 at comcast.net
Thu Jul 8 00:22:34 CEST 2021


Glad you aren't offended. Just my opinion, something I would never do.

Jay S.

On 7/7/2021 2:03 PM, Mattias Rickardsson wrote:
> Jay Schwichtenberg via Synth-diy <synth-diy at synth-diy.org 
> <mailto:synth-diy at synth-diy.org>> skrev:
>     My personal opinion is that this is in the top 10 ten list of dumb
>     shit things to do in SDIY.
> Alright, I admit this isn't really for SDIY, so the shit* probably 
> seems even dumber than it deserves.
> And I don't have to feel offended. (-;
>     These parts aren't made to do this electrically, you've mentioned
>     some of the issues.
>     Then there is the issues of having to go over the I2S interface
>     and sucking up uC bandwidth since it's a streaming interface and
>     needs constant data.
> It's not intended for pure CV needs.  Instead imagine cases where 
> there's already an audio converter, even an audio signal.
> - Synths/soundcards I/O jacks - MOTU and possibly others have already 
> let audio I/O work for DC CV as well. Many devices these days have 
> both audio and CV I/O, and it would be nice with something more 
> flexible than having them fixed to either or.
> - Internal audio from a codec in a hybrid synth - an adjustable DC 
> offset could be useful to calibrate away an offset error in an analog 
> stage downstream.
> - There are surely more reasonable applications as well.
> *Funnily enough, when I try to write "sdiy", the top suggestion is 
> actually "shit"! :-D
> /mr
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