On 1 August, the group carried out overdubs on the basic track, again at Trident. These additions included McCartney's lead vocal and bass guitar; backing vocals from Lennon, McCartney and Harrison; and tambourine, played by Starr. McCartney's vocal over the long coda, starting at around three minutes into the song, included a series of improvised shrieks that he later described as "Cary Grant on heat!" They then added a 36-piece orchestra over the coda, scored by Martin. The orchestra consisted of ten violins, three violas, three cellos, two flutes, one contra bassoon, one bassoon, two clarinets, one contra bass clarinet, four trumpets, four trombones, two horns, percussion and two string basses. According to Norman Sheffield, there was dissension initially among the orchestral musicians, some of whom "were looking down their noses at the Beatles, I think". Sheffield recalls that McCartney ensured their cooperation by demanding: "Do you guys want to get fucking paid or not?" During the first few takes, McCartney was unhappy about the lack of energy and passion in the orchestra's performance, so he stood up on the grand piano and started conducting the musicians from there.