[sdiy] Quantizer selectability?

[Harry Bissell Jr]

You are right on the mark. This is how my theremin
quantizer works. Convert the CV to digital, use that
value to address an eprom, convert the eprom data to
voltage

In fact, I used the Wiard MiniWave for my initial
development. Then I built my own, as the Wiard was
better suiter to really high speed use and actually
caused a lot of glitches because it was too fasr !

Now its a waveform generator like it was designed to
be
:^P

H^) harry



--- Metrophage <c0r3dump23 at yahoo.com> wrote:

> I know of quantizers which are preset with pots. I
> know of simple
> digital quantizers which use an EPROM and DAC. It
> would not be too hard
> for me to make a paint-by-numbers quantizer based on
> a previous
> schematic and ROM data. 
> 
> What interests me though is making an EPROM / DAC
> quantizer with
> pushbutton selectable tunings. It appears to me that
> such quantizers
> are similar to the VCDOs I have seen. Would I be
> accurate in my guess
> that as one can make tables of various waves to step
> through in a VCDO,
> that one can just as simply fill a 2764 or 27128
> with tables which
> represent a selection of musical scales, and step
> through them? I
> suppose there would need to be a comparator to
> determine which value of
> a scale is most accurate, in relation to its input
> at the time. What
> sort of format would the ROM data be in -
> frequencies in hex or binary?
> 
> Just wondering if this is conceptually on the mark,
> or if I am missing
> something which would be obvious to someone more
> knowledgable. I have
> very little experience with making digital circuits
> as of yet! This
> sounds sort of simple to me, but I have heard of no
> such project.
> Either not many are interested in this, or it
> doesn't work this way!
> 
> CJ
> 
> 
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