[sdiy] Cheap audio spectrum analyzer

[rsdio at audiobanshee.com]

If you have a precision VCO operating at a calibrated Volts/Octave, then your 'scope will be able to accurately track the frequency if you apply CV to the X input. Perhaps only the Emu VCO would be accurate enough, but maybe there are others.

Brian Willoughby
Sound Consulting

On Oct 26, 2015, at 10:40 AM, Jean-Pierre Desrochers <jpdesroc at oricom.ca> wrote:
> I was aware of that way to do spectrum analysis.
> Unfortunately I do not have a sweepable signal gen on hand.
> And doing so I would not have any way to know
> at what freq the sweep is at on the screen..
>