[sdiy] MIDI-CV convertor idea

[ColinMuirDorward]

Tom, it was just yesterday that I was going to check your site to see if
you had developed a midi to CV device yet.
Are you aiming to present this as an electric druid product? I hope so!

Colin


On Sun, Oct 25, 2020 at 10:50 AM Mike Beauchamp <list at mikebeauchamp.com>
wrote:

>
> > HOWEVER…a passive mix doesn’t use a virtual ground node, so there’s the
> > potential for bleed through from one channel to another. So I did a
> > quick simulation of the situation to see if this was a problem, shown
> > attached. U1 takes a 0-4V signal from the Bend DAC and turns it into a
> > +/-83mV signal. This is then fed to both mixers. The other mix input
> > comes from the appropriate Note DAC, also 0-4V. Each mixer is then
> > followed by x4 make-up gain, which compensates fro the /2 loss in the
> > mixer and adds an extra x2 to turn the Note CV range into 0-8V and the
> > pitch bend range into the standard +/-2 semitones.
>
> Just wanted to say that pitch bend range isn't standardized to +/- 2
> semitones, although that is a lot of synthesizers' default setting. The
> MIDI spec says that it is variable and reconfigurable to +/- 24
> semitones and optionally adjustable by cents. Some other makers of
> continuous pitch instruments require even larger ranges, and I think
> this is called for in the MPE spec as well.
>
> Mike
>
>
>
>
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