[sdiy] Programmable ICs / Scaling

[nN AAt e e]

i just got to wondering how one would go about say... taking something like
a performance synth that may not be 1v/oct and doing the math to figure out
what the scale is, then make something to convert it to 1v/oct...

...while mostly using programmable ICs as to make it [slightly] easier to
deal with math problems.

i know this isnt very hard to convert old korg/paia standards to roland
using analog based converters, but what would be good ICs to check out that
should be able to handle the voltage ranges of a synth? it doesn't seem like
it would be too difficult using something like PICs or Stamps, but i havent
really worked with either of them before.

has anyone here made any custom scaling devices?

this would probably be only used for cv output [nonstandard-> 1v/oct], but
1v/oct inputs would be pretty cool later on too.

- nate