[sdiy] Voltages for various frequencies

Scott Gravenhorst music.maker at gte.net
Thu Mar 21 11:29:33 CET 2002


If you have 5 pots, you could make each
switch a tunable pitch.  (c:


"Jimmy Gogas" <toothpick_77 at hotmail.com> wrote:
>I've built some of the modules for my Littleman synth, and was thinking of 
>building a small keyboard interface to test them out. Unfortunately, I still 
>haven't bought my MIDI keyboard and MIDI-to-CV converter yet so I was 
>thinking of using a bunch of momentary push-button switches lying around 
>here. I was thinking of building an extremely simplified version of the 
>Formant keyboard interface... just the resistor-switch ladder circuit and a 
>gate circuit. I only have 5 switches (only 5 pitches). Does anyone know the 
>corresponding input voltages (for the VCO) for the various pitch 
>frequencies? (I just need five)
>
>I would also appreciate it if someone can show me a simple circuit that 
>would be able to implement what I'm trying to accomplish (both the CV and 
>gate circuit).
>
>Thank you in advance.
>
>
>
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