The Beatles Group Members as instrumentalists and composers

Paul played bass, John rhythm guitar, George lead guitar and Ringo drums. But all the Beatles had some proficiency on the piano and each used it to compose songs, which contributed to the exceptional breadth of the Beatles music catalog.

Paul learned to play piano as a young boy but never learned to read music. Although he is known primarily as a bass player, McCartney experimented with almost every instrument, including Moog and Mellotron synthesizers. His mastery of the piano as a compositional instrument is said to have empowered him as a composer (perhaps something only fellow pianists can begin to appreciate). George Martin and John Lennon commented that McCartney was the most technically proficient guitarist and drummer in the band. For example, he played lead guitar on "Taxman" and "Ticket to Ride", drums on "The Ballad of John and Yoko" and "Back in the USSR" and piano on "Hey Jude" and "Let it Be". "Michelle" was performed entirely by Paul.

George was known for excelling when playing melodic lines, riffs and fills on guitar-like string instruments ('One of the greats', in McCartney's words). In addition to lead guitars and sitars, Harrison played bass on "Taxman" and "Two of Us". His usual allotment of one composition per album, however, is said to have contributed to the tensions surrounding the band's breakup.

Given his widely acknowledged expertise and inventiveness as a songwriter, John was less proficient playing rhythmic instruments such as drums or bass. For example, during the song "Another Girl" in the movie Help! he appears to play the drums uneasily and out of rhythm (the Beatles all switch their instruments during this clip). John also played bass in "Back in the USSR", "Hey Jude" and "The Long and Winding Road" in which, if one listens closely, a few technical mistakes can be heard. The other Beatles admitted to teasing Lennon about his timekeeping. When the remaining Beatles reunited in the mid 90s to record some of Lennon's unreleased demo tracks, producer Jeff Lynne used studio technology to compensate for Lennon's flexible sense of tempo (ironically, since his wonted instrumental role in the Beatles is usually characterized as rhythm guitar).

Though Ringo reportedly admits his musical knowledge beyond percussion is limited, he composed some songs on piano, including "Don't Pass Me By" and "Octopus's Garden". Ringo claimed to have contributed the famous line 'Father Mackenzie, wiping the dirt from his hands as walks from the grave' to "Eleanor Rigby", which was ostensibly written by McCartney. A line confirmed as his is, 'Look at him working, darning his socks in the night when there's nobody there.' Starr was also responsible for a number of song titles, inspired by his malapropisms of homespun Liverpudlian sayings. Some notables include "A Hard Day's Night", "Eight Days a Week" and "Tomorrow Never Knows". Critical appreciation of his steady, supportive drumming has increased through the decades. He is said to have recorded the drums on many Beatles recordings in a single take.

Producer of The Beatles, George Martin influenced many songs, performed in several and composed a few fragments. "Hello, Goodbye" is said to have developed from an improvised piano duet by McCartney and Martin. The orchestra parts heard in some Beatles recordings were mostly composed or arranged by Martin.