Erik de Castro Lopo wrote: >On Wed, 19 Jan 2005 13:56:59 +0900 >David Cournapeau <cournape@xxxxxxx> wrote: > > > >>It is way more difficult than that. Finding the pitch of a signal, even >>monophonic, is *very* tricky, for real instruments. >> >> > >Accuracy, speed, reliability; pick one and you'd be lucky to get 50% >of what you want :-). > >Erik > > If you are willing to give up on speed (I mean really giving up on speed, ie being ready to wait for several seconds for one second of sound on a modern computer), matching pursuit with harmonic atoms works really well from my experience. I could find the different notes of one piano chord with a "good" accuracy. See a description here http://www.irisa.fr/metiss/gribonval/Papers/2003/IEEESP/harmonicMP.pdf David
