McCartney played a Steinway grand piano and Ringo Starr was on drums. Each part was recorded onto a separate track, but there was some sound leakage between the two. From take nine the piano was given some reverb, added from the studio control room.
Onto the 10th take, the final one, McCartney overdubbed a clavichord, which was hired for the occasion from George Martin's company AIR, at a cost of five guineas. Starr also added maracas, hi-hat and tambourine.