[sdiy] Hybrid VCO

[metasonix]

> It seems a LOT of effort goes into building a VCO that tracks well and
> has little or no drift with temperature. I was wondering, has anyone
> tried using a microcontroller as a 'feedback element' to adjust the
> frequency of a VCO to take out temp drift? 

Um, well, why not just program the micro to read the CV and
output a waveform? Get rid of the need for analog circuits.
I have not seen this done as a separate VCO module yet, only
as an oscillator in a virtual analog synth. It seems to me a
Scenix processor might be fast enough for a wide range VCO.


Eric Barbour
Owner, METASONIX (www.metasonix.com)
Senior Editor, Vacuum Tube Valley magazine