The session took place from 7am to 2.30am, and saw nine takes of the song recorded. Only the first and last of these was complete.
McCartney then overdubbed his bass guitar onto track two of take nine. This was recorded by direct injection (DI) straight into the recording desk, bypassing the use of an amplifier, and was the first time the method had been used on a Beatles session. EMI built their own DI boxes, and perhaps pioneered the technique anywhere in the world.