[sdiy] Polyphonic MIDI to CV???

[Peter Grenader]

If it's any help, Buchla's 264 Quad Sample and Hold/Polyphonic Adapter did
just this using a non-midi voltage keyboard.  I have not seen a schemo for
this box.  I have worked with a couple of them however.

The bottom section consisted of a super-sensitive 4 step sequencer or sorts.
If the output of a keyboard was connected and if up to four keys (in this
instance, touch plates) were hit simultaniously,  this device would
demultiplex them and send four different descrete output voltages
corrosponding to the key drepressed.  Possibly there was a slight (very
slight) arpeggiation was required - I don't remember (it was 22 years ago).

For two years using this device I did not realize that this was its design
intention.  I patched it basically to do Analog Shift Register type voltage
distributions.  Then one day it was explained to me that it was Don's
attempt to create multi voltage sources from a single keyboard.

I tried it, and oh golly, it worked.

Hope this helps.

-Peter

on 2/18/02 12:19 PM, KPEEK1 at prodigy.net at KPEEK1 at prodigy.net wrote:

> Here is my simplified question:
> 
> If I have two monosynth modules and two separate MIDI
> to CV/Gate convertors, then I can play two-note
> polyphony provided the two MIDI to CV are on different
> MIDI channels (eg. Channel 1 and 2)
> 
> I order to accomplish this I need to play each note on
> a separate keyboard or input device. I want to make
> something where I can play two and three notes and
> have each assigned to separate monosynth modules like
> the Oberheim SEM 4 voice but using a MIDI controller.
> 
> How can I make it where the notes are prioritized and
> the second note played go to the second monosynth? The
> third note to the third monosynth etc.?
> 
> I know some commercial MIDI to CV convertors do this,
> but I would prefer to build one if possible.
> 
> Thanks!!!!!!
>