[sdiy] Midi2CV accuracy(was MIDI2CV alternatives)

[Paul Maddox]

Richard,

> But there are good reasons
> for using more bits. One is that famous extra accuracy. Another is that
you
> can sum in pitch bend and other modulation sources internally and send the
> result to a single DAC. This is less analogue design and trimming hassle,
> and sometimes also cheaper than using multiple DACs.

I use a seperate output for the Pitchbend wheel and then sum the voltages.
Why? because of the accuracy again, so the pitch bend has 12 bits to itself.
It also means you can just plug a jack into the pitch bend socket, remove it
from the CVs and use it for something else. You can, with the polyDac, you
can use a Tip, Ring, Sleeve style jack, so you can take the pitch bend CV
out, play with it and feed it back..
I did a similar thing for the modwheel CV, without the jack plugged in, the
modwheel CV does nothing, plug a mono jack in and you get the mod CV out,
but plug in a stereo Jack (TRS) the modwheel CV comes out on the tip, you
feed this into your LFOs VCA, feed the output of the the LFO VCA into the
Ring and you can then apply Modulation to your voltage signals.

So there are some real advatnages to keeping the CVs seperate.

Paul