Everett adds that McCartney's imagery is "vivid and yet common enough to elicit enormous compassion for these lost souls". Recording "Eleanor Rigby" does not have a standard pop backing. None of the Beatles played instruments on it, although Lennon and Harrison did contribute harmony vocals. Like the earlier song "Yesterday", "Eleanor Rigby" employs a classical string ensemble – in this case, an octet of studio musicians, comprising four violins, two violas and two cellos, all performing a score composed by George Martin. When writing the string arrangement, Martin drew inspiration from Bernard Herrmann's work, particularly the latter's score for the 1960 film Psycho. Whereas "Yesterday" is played legato, "Eleanor Rigby" is played mainly in staccato chords with melodic embellishments. McCartney, reluctant to repeat what he had done on "Yesterday", explicitly expressed that he did not want the strings to sound too cloying. For the most part, the instruments "double up" – that is, they serve as a single string quartet but with two instruments playing each of the four parts. Microphones were placed close to the instruments to produce a more biting and raw sound. Engineer Geoff Emerick was admonished by the string players saying "You're not supposed to do that." Fearing such close proximity to their instruments would expose the slightest deficiencies in their technique, the players kept moving their chairs away from the microphones until Martin got on the talk-back system and scolded: "Stop moving the chairs!" Martin recorded two versions, one with vibrato and one without, the latter of which was used. Lennon recalled in 1980 that "Eleanor Rigby" was "Paul's baby, and I helped with the education of the child ... The violin backing was Paul's idea. Jane Asher had turned him on to Vivaldi, and it was very good." The octet was recorded on 28 April 1966, in Studio 2 at EMI Studios. The track was completed in Studio 3 on 29 April and on 6 June. Take 15 was selected as the master. The final overdub, on 6 June, was McCartney's addition of the "Ah, look at all the lonely people" refrain over the song's final chorus. This was requested by Martin, who said he came up with the idea of the line working contrapuntally to the chorus melody. The original stereo mix had the lead vocal alone in the right channel during the verses, with the strings mixed to one channel, while the