In a 1992 interview for "Musician" magazine, George Harrison said that it was he and Ringo Starr who selected the sounds, sourced from EMI's tape library, including the "Number nine, number nine" dialogue. Authors Chip Madinger and Mark Easter write that the content of Harrison's lesser-known experimental piece "Dream Scene", recorded between November 1967 and February 1968 for his "Wonderwall Music" album, suggests that Harrison had a greater influence on "Revolution 9" 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 "", Ono says that "George, John and I made ['Revolution 9']" and that Harrison "sort of instigated it" and pushed them to create the piece.