The Infinite Jukebox, by Paul Lamere, is a bit difficult to explain, but easy to grasp once you start listening to songs and get tangled in its infinite beat loop.
The app works by sending your uploaded track over to The Echo Nest, where it is decomposed into individual beats. Each beat is then analyzed and matched to other similar sounding beats in the song. This information is used to create a detailed song graph of paths though similar sounding beats. As the song is played, when the next beat has similar sounding beats there’s a chance that we will branch to a completely different part of the song. Since the branching is to a very similar sounding beat in the song, you (in theory) won’t notice the jump. This process of branching to similar sounding beats can continue forever, giving you an infinitely long version of the song.
You can get stuck in some songs and not get out (Radiohead’s “Karma Police“, for instance), like an auditory version of Satre’s ‘No Escape’. So far, I’m really enjoying: Call Me Maybe, R Kelly’s Ignition (remix), Scatman by Scatman John, and Karma Police. There are plenty of songs to get stuck in though. [via waxy, obviously]