Hi Guys,
I was wanting some ideas on making the best 1kHz sine wave for audio test tone.
I know you would never get the best result out of any mcu source, and the faster the better,
but the test tone is for amplifier clipping test, not quality test.

The best I can come up with is the biggest resistor ladder that can possibly be afforded
with available ports on the chip for as many possible voltage levels.
Where the hardware and software is totally dedicated to producing the sine wave,
and nothing else.

There would be some points where you could set more than one IO port to feed
current via more than one resistor to improve resolution.
Are there any examples of this?
Cheers, Art.