That was the idea because the drum objects are tuned for the detector software, not for the song. Sure real drums are tuned and could be detected by these methods, possibly using the suggested two mics. By the way: As recently as two weeks ago, for learning purposes, I picked up drumming mp3s of John Bonham (Led Zeppelin) at http://www.drummerworld.com/Sound/johnbohnhammobylive.mp3 http://www.drummerworld.com/Sound/johnbonhamdrumsalone.mp3 http://www.drummerworld.com/Sound/JohnBonhamMoby.mp3 http://www.drummerworld.com/Sound/JohnBonham_When.mp3 http://www.drummerworld.com/Sound/johnbonhamRockAndRoll.mp3 http://www.drummerworld.com/Sound/johnbonhamfool.mp3 Two first files could work as an excellent example resource. I planned manually to mark the duples (time, name of the drum). I even downloaded plenty of photos of John Bonham so that I know how he arranged the drum set in the stereo field -- at http://www.led-zeppelin.org/multimedia/photoarchive.html Juhana -- http://music.columbia.edu/mailman/listinfo/linux-graphics-dev for developers of open source graphics software