2001: A Space Odyssey (soundtrack) that shift slowly over time. This technique was pioneered in "Atmosphères", the only Ligeti piece heard in its entirety in the film. Ligeti admired Kubrick's film, but in addition to being irritated by Kubrick's failure to obtain permission directly from him, he was offended that his music was used in a film soundtrack shared by composers Johann and Richard Strauss. The Richard and Johann Strauss pieces and György Ligeti's "Requiem" (the Kyrie section) act as recurring motifs in the film's storyline. Richard Strauss' "Also Sprach Zarathustra" is first heard in the opening title which juxtaposes the Sun, Earth, and Moon.
2001: A Space Odyssey (film) version of "Zarathustra" used in the film, and used the shorter version of "Lux aeterna" from the film. As additional "bonus tracks" at the end, the CD includes the versions of "Zarathustra" and "Lux aeterna" on the old MGM soundtrack, an "unaltered" performance of "Aventures", and a nine-minute compilation of all of Hal's dialogue. North's unused music was first released in Telarc's issue of the main theme on "Hollywood's Greatest Hits, Vol. 2", a compilation album by Erich Kunzel and the Cincinnati Pops Orchestra. All the music North originally wrote was recorded commercially by his friend and colleague Jerry Goldsmith