Complex sentence: The second disc, of previously unreleased music, contains additional music not present in the film, including two bonus tracks, one of which, "Desolation Path", is a slightly different version of "Alternate Love Theme/I Dreamt Music".
Split into simpler sentences: The second disc, of previously unreleased music, contains additional music not present in the film, including two bonus tracks. One of these, "Desolation Path", is a slightly different version of "Alternate Love Theme/I Dreamt Music".