were reused for the "Golden Slumbers" / "Carry That Weight" portion of the medley, including the opening verses and later guitar arpeggios. Structurally, the music begins with a piano ballad and moves to several other styles, including boogie-woogie piano, arpeggiated guitars and nursery rhyme. Beatles author Ian MacDonald speculates that the guitar arpeggios at the end of the track were influenced by "I Want You (She's So Heavy)" and the middle section of "Here Comes the Sun", and that the overall structure was inspired by Lennon's "Happiness Is a Warm Gun" from the previous year's album The Beatles, which also joined unrelated song fragments together. Recording The basic backing track was recorded at Olympic Sound Studios in Barnes on 6 May 1969. Recording started at 3pm and went on until 4am the next morning. McCartney sang lead and played piano, Lennon played an Epiphone Casino guitar, George Harrison played a Fender Telecaster guitar fed through a Leslie speaker, and Ringo Starr played drums. The group recorded 36 takes, selecting take 30 as the best, which was made into a rough stereo mix. The basic structure of the song as it appeared on Abbey Road had not been worked out at this stage, and the original recording ran onto a loose jam session, ending up as a fast rock-and-roll instrumental towards the end. The track was completed in EMI Studios. McCartney overdubbed a lead vocal onto the basic track on 1 July, and further vocals and sound effects were added on 15 July. On 30 July, a reduction mix was made of the original eight track tape, so further overdubs could be made, and a rough mix of the Abbey Road medley was put together. The cross-fade from "You Never Give Me Your Money" into the next track, "Sun King", proved to be problematic, and the group made several attempts before deciding to merge the songs via an organ note. McCartney completed the instrumental overdubs the next day, on 31 July, by adding a bass guitar part and additional piano overdubs, including some punched-in honky-tonk piano in place of the original. The final recording session occurred on 5 August, when McCartney made a number of tape loops at EMI Studios, including bells, birds, bubbles and chirping crickets. Martin mixed the track into stereo on 13 August, and made 11 attempts at a final mix, combining the tape loops with the cross-fade