> Surely if TMR0 overflows at 19.5 KHz, by switching a PWM every time I
could
> get 9.7 KHz,

Yes, but at what *resolution*.  You will make a descision and possibly
change the output at 19.5KHz rate, or every 51.2uS.  You can use this to
produce a square wave at half that rate, but I thought you originally wanted
sine waves and other arbitrary waveforms out.  At one point you said you
wanted 8 bit resolution.  Show me how you're going to create 256 different
average voltage levels with the averaging period less than 500uS.

> every 256 interrupts I could get about 76 Hz; in the original
> post I mentioned 4.9 KHz being the highest note I'd consider..

Yes, so doesn't that show this method won't work?  I don't understand your
point.


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