Tap Tempo
Tap the button, or press Space, Enter or T, in time with the music. Tempo is the average of your last taps. A pause of three seconds starts a new run. Escape resets.
-- BPM
Waiting for taps.
Times
Bar length assumes 4/4, four quarter notes. Quarter = 60000 / BPM. Eighth = quarter / 2. Bar = quarter x 4.