History: Early Years Of The Beatles

George Martin's close involvement in his role as producer made him one of the leading candidates for the informal title of "fifth Beatle". He brought his classical musical training to bear in various ways. The string quartet accompaniment to "Yesterday" was his idea—the band members were initially unenthusiastic about the concept, but the result was a revelation to them. Gould also describes how, "as Lennon and McCartney became progressively more ambitious in their songwriting, Martin began to function as an informal music teacher to them". This, coupled with his willingness to experiment in response to their suggestions—such as adding "something baroque" to a particular recording—facilitated their creative development. As well as scoring orchestral arrangements for recordings, Martin often performed, playing instruments including piano, organ and brass.
Looking back on the making of Sgt. Pepper, Martin said, "'Sergeant Pepper' itself didn't appear until halfway through making the album. It was Paul's song, just an ordinary rock number and not particularly brilliant as songs go. ... Paul said, 'Why don't we make the album as though the Pepper band really existed, as though Sergeant Pepper was making the record? We'll dub in effects and things.' I loved the idea, and from that moment on it was as though Pepper had a life of its own." Recalling how strongly the song contrasted with Lennon's compositions, Martin spoke too of his own stabilizing influence:
Compared with Paul's songs, all of which seemed to keep in some sort of touch with reality, John's had a psychedelic, almost mystical quality. ... John's imagery is one of the best things about his work—"tangerine trees", "marmalade skies", "cellophane flowers." ... I always saw him as an aural Salvador Dalí, rather than some drug-ridden record artist. On the other hand, I would be stupid to pretend that drugs didn't figure quite heavily in The Beatles' lives at that time. At the same time they knew that I, in my schoolmasterly role, didn't approve. ... Not only was I not into it myself, I couldn't see the need for it; and there's no doubt that, if I too had been on dope, Pepper would never have been the album it was.
Harrison echoed Martin's description of his stabilizing role: "I think we just grew through those years together, him as the straight man and us as the loonies; but he was always there for us to interpret our madness—we used to be slightly avant-garde on certain days of the week, and he would be there as the anchor person, to communicate that through the engineers and on to the tape."