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
/∗∗/