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 (film) of most films of the era released both as a "roadshow" (in Cinerama format in the case of "2001") and general release (in 70-millimetre in the case of "2001"), the entrance music, intermission music (and intermission altogether), and postcredit exit music were cut from most prints of the latter version, although these have been restored to most DVD releases. The following year, a United States Department of State committee chose "2001" as the American entry at the 6th Moscow International Film Festival. The film was rereleased in 1974, 1977, and again in 1980. In 2001, a restoration of the 70mm