Harrison sang lead vocals and played acoustic guitar, Moog, and handclaps. Paul McCartney sang backing vocals, played bass guitar, and handclaps. Ringo Starr played drums and handclaps. John Lennon did not contribute to the song as he was recovering from a recent car crash and uncredited musicians played violas, cellos, double bass, piccolos, flutes, alto flutes, and clarinets. Harrison capoed his guitar on the 7th fret, resulting the final key of A major. He also used the same technique on his 1965 song "If I Needed Someone," which shares a similar melodic pattern. Harrison, McCartney and Starr recorded the rhythm track in 13 takes on 7 July 1969. Towards the end of the session Harrison spent an hour re-recording his acoustic guitar part. The following day he taped his lead vocals, and he and McCartney twice recorded their backing vocals twice to give a fuller sound. A harmonium and handclaps were added on 16 July. Harrison's guitar solo was overdubbed on 6 August, and the orchestral parts were added on 15 August. "Here Comes The Sun" was completed four days later with the addition of Harrison's Moog part. This song was originally proposed by Carl Sagan to be part of the Voyager Golden Record sent to space in 1977. While the Beatles agreed with this, Sagan was unable to form a definite agreement with Apple Records prior to the spacecraft's launch date.