digital pluck detector

[igor12]

OK, I gave up on the pic based pluck detector. I tried doing it using the A/D and using the on chip comparator. Works but tracking and glitches are terrible. I  just don't think the PIC is cutout for this sort of thing. Or maybe it is my code.

[earthtonesaudio]

CVSD
http://systembus.com/databook/Audio/an607.pdf
Take the output of the first XOR from figure 2, that's your pluck.

I imagine you could also use something like this:
http://www.tpub.com/content/neets/14184/css/14184_163.htm
LPF on the input, some gain, then into the tuned circuit, and finally into a comparator.