2001: A Space Odyssey United States Library of Congress and selected for preservation in the National Film Registry. A musical score was commissioned for the film and composed by Alex North, but Kubrick ultimately decided not to use it, in favour of the classical pieces he used as guides during shooting. These included Richard Strauss's "Also Sprach Zarathustra", Johann Strauss' "Blue Danube Waltz", and music by twentieth-century composers Aram Khachaturian and Gyorgy Ligeti. Toward the end of the sequence where the HAL 9000 computer is lobotomized, it begins to play the 1892 song "Daisy Bell (Bicycle Built for Two)" by Harry Dacre, which Clarke
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