Octave and Fifth Quantizer

[jorgen.bergfors at idg.se]

>Don't you mean octaves and flatted fifths?  Raising the CV by one-half volt >raises pitch by 6 semi-tones, but a fifth would actually be seven semi-tones >up.  Six semi-tones will give a flatted fifth (or tri-tone).  Is this what >you were going for?  Obviously, the resistor matrix for octaves and perfect >fifths would be a bit more complex - maybe not even possible using Simonton's >flash converter (I haven't thought it through, however). 

Wait a minute, did I get the fifths thing wrong? The interval between C and G is a fifth, right? G is 7 semitones up from C, right?
So if C is 1047Hz, then G is 1568 Hz. That's a factor of 1,4976, right?
So wouldn't adding 0,4976 volt raise the frequency a fifth? Or am I thinking wrong here? I'm not a maths guy.
By the way, I selected a fifth just to divide the octave in half and make the range the fine tune pot has to cover as small as possible. That makes it easier to fine tune the VCO. You could easily tune it for perfect fifths if you wanted. The fifths use a separate voltage divider, that has it's own multi-turn trimpot. You would just adjust it a little. By changing a resistor in the voltage divider you could get any other interval for the least significant bit. The other bits are tied to octaves though.

/Jorgen