2001: A Space Odyssey (soundtrack) used is Ligeti's "Lux Aeterna" and an electronically altered form of his "Aventures", the last of which was so used without Ligeti's permission and is not listed in the film's credits. Since the film, "Also sprach Zarathustra" has been used in many other contexts. It was used by the BBC and by CTV in Canada as the introductory theme music for their television coverage of the Apollo space missions, as well as stage entrance music for multiple acts including Elvis Presley late in his career. Jazz and rock variants of the theme have also been composed, the most well known
2001: A Space Odyssey (soundtrack) 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 Strauss II and Richard Strauss. Other music used is Ligeti's "Lux Aeterna", the second movement of his "Requiem" and an electronically altered form of his "Aventures", the last of which was also used without Ligeti's permission and is not listed in the film's credits. HAL's version of the popular song "Daisy Bell" (referred to by HAL as "Daisy" in the film) was inspired by a computer-synthesized arrangement by Max Mathews, which Arthur