A friend of mine from college (named Pat Fahey but that doesn't matter) used to perform with a band called the Muffins and some of their music was composed according to the moves on a chess board. I know that mathematical music has a long history but I enjoyed reading about Rudresh Mahanthappa a jazz musician from India who composes jazz with mathematics:
http://www.wired.com/news/culture/reviews/...l?tw=wn_index_2A representative piece called Bristling Melody:
http://sonibyte.com/audio/1117.mp3Sounds a little like Coltrane!