...and no, I'm not talking about the iTunes "random" button.
From The Wire (UK Magazine, not Baltimore PD show):
[Tim] Hodgkinson met software designer Andy Wilson. Together they investigated ways to locate a selection of sound files within different contexts and to use them in different ways...so that repeated plays produce a stream of previously unheard music.
Yes, that's right. Every time you play the CD, it plays different parts of the same track.
This reminds me of The Finder: Talisman, by Carla Speed McNeil, in which the content of a book changes every time you read it. But of course, that was sci-fi, if really friggin' awesome sci-fi.
In the case of this CD, the future is now!