By tapping the Tap button in time with the beat of a song, Beats will let you know the BPM (beats per minute). The more beats you tap in time to, the closer the it’ll get to the exact tempo of the song.
To work out the BPM of a song on your iPhone or iPod, open the iPod or Music app and start playing the song before opening Beats.
Stop tapping for 3 seconds to reset.
Tip: Double-clicking the iPhone’s home button will let you pause the iPod, change the song playing and change the volume (assuming you have your iPhone and iPod set to do this).