There was a website that just played you various instruments, guitar rifts, beats, melodies, etc... and you either "like" or "dislike" the stuff as it plays. Eventually, enough data would be gathered to generate a track specifically tailored to your music taste.
Basically, it would just throw stuff at you. At first it's smaller 3-5 second clips of sound. Then, if you upvote it, next time around it'll be longer. If you downvote the longer one, it would eventually play the original again to see if you still like it. If you do, it'll play another longer one that is a bit different.
Basically, just making music by having stuff thrown at your ears until, through a series of votes, the algorithm behind the whole thing can put together a coherent track using all the stuff you liked.





