True, and cool (I hadn't heard of zero-crossing before, thanks!) but an FFT gives you the ability to do interesting things like chord recognition. I may have t

True, and cool (I hadn't heard of zero-crossing before, thanks!) but an FFT gives you the ability to do interesting things like chord recognition. I may have to play around with the code here and see if I can get it to pick out multiple notes being played simultaneously, and maybe get it to measure how fast I can do chord changes (like Justin Sandercoe's "1 minute changes" practice method[1]). [1]: http://justinguitar.com/en/BC-115-1MinuteChanges.php http://justinguitar.com/en/BC-115-1MinuteChanges.php