Here’s a neat little free Mac app that’s getting some attention: Tangerine.
It analyses the music in your iTunes library and works out the BPM (beats per minute) of each track. It’s in beta at present, but works really quite well. There are multiple uses, but I guess the chief benefit will be for those who like to exercise to music and want to jog at a consistent speed!
I could use it to discover that the people running twice as fast as me are only doing so because they’re listening to Hall & Oates’ Maneater (179bpm) while I struggle along with Dylan’s One More Night (89bpm).
Of course, if you’re creating playlists of songs that blend into each other, you can juxtapose songs with a x2 speed multiple and they work rather well…