History: Early Years Of The Beatles

In The Beatles as Musicians, Walter Everett points out Lennon and McCartney's contrasting motivations and approaches to composition: "McCartney may be said to have constantly developed—as a means to entertain—a focused musical talent with an ear for counterpoint and other aspects of craft in the demonstration of a universally agreed-upon common language that he did much to enrich. Conversely, Lennon's mature music is best appreciated as the daring product of a largely unconscious, searching but undisciplined artistic sensibility."
Ian MacDonald, comparing the two composers in Revolution in the Head, describes McCartney as "a natural melodist—a creator of tunes capable of existing apart from their harmony". His melody lines are characterized as primarily "vertical", employing wide, consonant intervals which express his "extrovert energy and optimism". Conversely, Lennon's "sedentary, ironic personality" is reflected in a "horizontal" approach featuring minimal, dissonant intervals and repetitive melodies which rely on their harmonic accompaniment for interest: "Basically a realist, he instinctively kept his melodies close to the rhythms and cadences of speech, colouring his lyrics with bluesy tone and harmony rather than creating tunes that made striking shapes of their own." MacDonald praises Harrison's lead guitar work for the role his "characterful lines and textural colourings" play in supporting Lennon and McCartney's parts, and describes Starr as "the father of modern pop/rock drumming. ... His faintly behind-the-beat style subtly propelled The Beatles, his tunings brought the bottom end into recorded drum sound, and his distinctly eccentric fills remain among the most memorable in pop music."
• Influences
The Beatles' earliest influences include Carl Perkins, Elvis Presley, Little Richard and Chuck Berry, whose songs they covered more often than any other artist's in performances throughout their career. During their co-residency with Little Richard at the Star-Club in Hamburg, from April to May 1962, he advised them on the proper technique for performing his songs. Of Presley, Lennon said, "Nothing really affected me until I heard Elvis. If there hadn't been Elvis, there would not have been The Beatles". Other early influences include Buddy Holly, Eddie Cochran, Roy Orbison and the Everly Brothers. The Beatles continued to absorb influences long after their initial success, often finding new musical and lyrical avenues by listening to their contemporaries, including Bob Dylan, Frank Zappa, The Lovin' Spoonful, The Byrds and The Beach Boys, whose 1966 album Pet Sounds amazed and inspired McCartney. Martin stated, "Without Pet Sounds, Sgt. Pepper wouldn't have happened. ... Pepper was an attempt to equal Pet Sounds."