"John & Yoko", the first side, a recording made on 22 and 27 April 1969, is of Lennon and Ono calling out each other's names, through a range of volume, tempos, and emotions, over the sound of their heartbeats. The two recorded on individual speakers. Lennon described the heartbeats as being "like African drums", and the piece being "like an extended, very extreme "John and Marsha" that was out years ago by Stan Freberg. It really makes your hair stand on end." Lennon edited the two together on 1 May 1969.