[sdiy] simulate detune / polyphony with a single DCO

[Chris McDowell]

Howdy list, 

I've been playing with DCOs, and am realizing that detune or even polyphony (which would end up paraphony I guess) could be achieved with a single DCO. The idea is to use two timers in a microcontroller, pulsing the same pin that's used to reset the DCO's integrator. A built in DAC from the micro controls the rate of the integrator, and as detune increased, would adjust the slope. I have a PCB on the way to test all this out, looks good in LTSpice. 

Anyone heard of this being done before? Are there any glaring dumb oversights?

Cheers! 
Chris