[sdiy] V/Oct > V/Hz

[dreichert at sympatico.ca]

Hi Steve,

Check out pretty much any VCO design on the many webpages the members have here and simply build the exponential converter portion of them, then send the MIDI/CV through that and then into your synth.

I recommend the ASM-1 as a good one to use (though many other are very similar)

One key thing though is that most expo converters have a current output instead of voltage, and that they draw current instead of supplying it. The solution is to run the output through a simple unity gain inverting amplifier.


> 
> From: "Steve Begin" <trypannon at hotmail.com>
> Date: 2003/09/24 Wed PM 09:59:46 EST
> To: "synth" <synth-diy at dropmix.xs4all.nl>
> Subject: [sdiy] V/Oct > V/Hz
> 
> I was thinking of buying a cheap monosynth, and there's a cs-15 in a nearby store which looks pretty fun, but it takes V/Hz cv, and i have a paia midi2cv without the V/Hz option (and i'd rather not add that option because then I wouldn't be able to use the 9700 anymore).  So I'm wondering if there's anything I (still just a beginner) can do to mod the cs-15 to work with V/Oct, or any other inexpensive way to control the cs-15 that comes to mind.
> thanks,
> Steve 
> 
> 
> 
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://synth-diy.org/pipermail/synth-diy/attachments/20030925/32a705cc/attachment.htm>