The session for Martin's brass and cello arrangement took place on 15 December. Another mix down was then carried out, reducing all the contributions to two tape tracks. Author Ian MacDonald comments that Martin's contribution heightens the song's Indian qualities, as represented first by the swarmandal, through his scoring of the cellos to " exotically" around McCartney's "sitar-like" guitar figures before the coda. Further overdubs, on what was now named take 26, were two vocal parts by Lennon, the second one doubling the main vocal over the choruses. Lennon re-recorded one of his vocals on 21 December, singing a harmony over the final chorus. Some piano was also added at this time, along with a snare drum part.