MOTM

On Fri, 17 Mar 2000 davevosh@... wrote:

> crow,
> unless d/a - a/d systems have fallen in price radically, that could be a 
> limiting factor. it used to be ( is it still ? ) that increasing accuracy 
> cost quite a bit more. plus, what is enough ? 10 bit ? 12 bit ? 16 bit ?  i`m 
> not sure if those newer cheap d/a`s that are used in cd players, etc. are 
> compatible with this sort of application. may need to fall back to the old 
> brute force approach.

  Well, I wouldn't use linear PCM DACs as my first choice. :)  I will have
to look and see what the latest parts are that would 1) serve the purpose
and 2) not cost too much.  Maxim makes a bazillion A/D and D/As; I'm sure
something in there would work.  Isn't there some dude on the list that
works at Maxim? ;)

  SCI used a 16-bit DAC to do all their pitch (and parameter) setting;
I'll have to dig out the technical manual and review how they arrived at
pitches and controlled errors.  I think they also used the DAC as part of
a SAR circuit to digitize the knobs to something like 7 bits.  It is a
starting place, at least.

Crow

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