> For example, say I have a loop of some recorded drums at 120 BPM. I would > like to know exactly how long the audio sample must be to match 120BPM, > rather then trial and error. this is really easy. i would not even call this math ;-) with samplerate R, 1 sec = R samples at x BPM, 1 min = 60 sec = x beats. so the duration of 1 beat = 60/x sec combined: 1 beat = R*60/x samples. so at 120 BPM, 44100 Hz, 1 beat == 22050 samples. but you probably want your loops to be 4 beats, so 88200 samples. maarten
