than has been acknowledged. In his book about the Beatles' White Album, titled Revolution, David Quantick lists Lennon, Ono and Harrison as the "actual writers", despite the Lennon–McCartney composer's credit. In the 2011 documentary George Harrison: Living in the Material World, Ono says that "George, John and I made ['Revolution 9']" and that Harrison "sort of instigated it" and pushed them to create the piece. Recording "Revolution 9" originated on 30 May 1968 during the first recording session for Lennon's composition "Revolution". Take 20 of that song lasted more than ten minutes and was given additional overdubs over the next two sessions. Mark Lewisohn describes the last six minutes as "pure chaos ... with discordant instrumental jamming, feedback, John repeatedly screaming 'RIGHT' and then, simply, repeatedly screaming ... with Yoko talking and saying such off-the-wall phrases as 'you become naked', and with the overlaying of miscellaneous, home-made sound effects tapes." Lennon soon decided to make the first part of the recording into a conventional Beatles song, "Revolution 1", and to use the last six minutes as the basis for a separate track, "Revolution 9". He began preparing additional sound effects and tape loops: some newly recorded in the studio, at home and from the studio archives. The work culminated on 20 June, with Lennon performing a live mix from tape loops running on machines in all three studios at EMI Studios, but during the live mix, the STEED system ran out and the sound of the tape machine rewinding can be heard at the 5:11 mark and additional prose was overdubbed by Lennon and Harrison. More overdubs were added on 21 June followed by final mixing in stereo. The stereo master was completed on 25 June when it was shortened by 53 seconds. Although other songs on the album were separately remixed for the mono version, the complexity of "Revolution 9" necessitated making the mono mix a direct reduction of the final stereo master. McCartney had been out of the country when "Revolution 9" was assembled and mixed; he was unimpressed when he first heard the finished track, and later tried to persuade Lennon to drop his insistence that it be included on the album. Lennon said that the final editing was done by himself and Ono alone. Structure and content "Revolution 9" is a sound collage, which has been described as piece of experimental, avant-garde, musique concrète, surrealist, and