"Revolution 9" is a musique concrète track that appeared on The Beatles' 1968 self-titled LP release (commonly known as the White Album).
The recording began as an extended ending to the album version of "Revolution", to which were added vocal and music sound clips, tape loops, and sound effects influenced by the musique concrète styles of Karlheinz Stockhausen, Edgard Varèse, Luigi Nono, and John Cage, further manipulated with editing and sound modification techniques (stereo panning and fading). At over eight minutes, it is the longest track on the album, as well as the longest Beatles track ever officially released. Read more on Last.fm. User-contributed text is available under the Creative Commons By-SA License; additional terms may apply.