Today I discovered Tangerine, a BPM (Beats Per Minute) analyzer for use with iTunes on a mac. I downloaded it, and it works as advertised. It scans your iTunes music library, and analyzes the BPM (and intensity of the pattern) of each track. It does this in the background, and on my Mac mini Core duo I can continue wih my normal programs while Tangerine analyzes the tracks. The BPM values get saved to your iTunes library, so they will also show up in iTunes if you have the BPM column visible there. The “Intensity” will not be visible in your normal iTunes lists.