How can I calculate and set the BPM of a loop precisesly?
We assume you have a loop with “N” bars, and it’s time signature is 4/4. If you know it’s length “S” in samples (it is shown in Sample Edit screen as the “Sample End” parameter, if Sample Start is set to “000000”), the BPM can be calculated as: BPM = 240/((S/N)/44100) S divided by N is the length (in samples) of one bar. S/N divided by 44100 samples per second gives the precise value of sample length (L) in seconds, e.g.: N=2 S=158760 BPM = 240/((158760/2)/44100) = 133.33 (the length of one bar L = (S/N)/44100 = 1.8 seconds) If you know sample’s length (L) is seconds, the BPM can be calculated as: BPM = 240/(L/N) L divided by N is simply the length of one bar. So, if you have 4 measures (bars) lasting for 7.4 seconds, e.g.: BPM = 240/(7.4/4) = 129.
