A 7-track demo CD dubbed the "Pre-Surgery Sampler", was released on July 24, 2008. A 22-track soundtrack was released on September 30. Songs do not appear in the same sequence on the CD as they do in the film. On February 20, 2009, an extended edition of the soundtrack was released online. The "Deluxe Edition" contains 38 tracks; and the song, "Zydrate Anatomy", was re-cut and used in its film version for this edition. Melora Creager of Rasputina plays cello on the soundtrack.