Click on the CLEAR button to start - the Tap me button will turn white and
the Beats Per Minute indicator will say ready.
Select the number of beats for each tap. Usually this will be 2 beats per tap but fast music may be easier with a tap every 4 beats
and for slow music it's best to tap on every beat.
For a waltz (3/4 time) always use 1 or 3 beats for each tap.
Now tap the button in time with your music track, checking that it changes colour with each tap.
After a few taps, the Beats Per Minute indicator will have settled down to a steady value and will then turn red.