On May 31, 1968, working on what will become The White Album, The Beatles added overdubs of bass and vocals on ‘Revolution’. After numerous overdubs have been added, the final six minutes of the song evolved into chaotic, jamming, with Lennon repeatedly shouting "alright" and Yoko Ono speaking random phrases. The jam becomes the basis for ‘Revolution 9’, and this session is the first that Yoko attends."