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.