[sdiy] M-Audio Radium CV to MIDI mod

[megaohm]

Yes you're right. I just found those posts. Have you expanded it to multiple
CV ins? Have you gotten any interesting/unexpected things out of this mod?

peng


On 12/5/05, xamboldt <xamboldt at earthlink.net> wrote:
>
> I mentioned doing this to an Evolution MIDI controller a few months
> ago, and I first heard about it on the list quite a few months before
> that in posts by Grant Richter and Larry Hendry.
>
> Anyway, I prevented negative voltage from getting into the circuit
> with a diode routing neg voltages to ground. I don't have any
> positive voltage protection other than the attenuator - although I'd
> like to add something. I was thinking of a zener, but haven't gotten
> around to trying it yet... Has anyone else?
>
> -Chris
>
> On Dec 5, 2005, at 4:06 PM, megaohm wrote:
>
> > I don't remember ever seeing anything about this. But it is such a
> > simple concept I'm sure it's been done.
> >
> >   The Radium's pots have 5 volts on one leg, ground on the opposite
> > leg, and the wiper connects to a 4051. I disconnected the 5V source
> > at the pot and soldered a wire from the 5V pad to the switch of a
> > NC jack. The tip of the jack is wired to the pot leg (the one that
> > was connected to the 5V internal source. With nothing plugged in,
> > the pot acts exactly how it normally did. Pug an envelope in and
> > that becomes the voltage source for the pot.
> >
> >   This should work for any digital stuff that uses voltage divider
> > pots.
> >
> > peng
> >
> >
> >
> > On 12/5/05, Rafael Cohen <rafael.cohen at gmail.com> wrote:
> > I vaguely remember the email on list about this process a while
> > back, but can you remind me how this mod goes?
> > Thanks,
> > Rafael
> >
>
>
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