Sgt. Pepper's Lonely Hearts Club Band "Being for the Benefit of Mr. Kite!" and "A Day in the Life". Producer George Martin and engineer Geoff Emerick helped realise the group's ideas by approaching the studio as an instrument, applying orchestral overdubs, sound effects and other methods of tape manipulation. Recording was completed on 21 April 1967. The cover, depicting the Beatles posing in front of a tableau of celebrities and historical figures, was designed by the British pop artists Peter Blake and Jann Haworth. "Sgt. Pepper" is regarded by musicologists as an early concept album that advanced the use of extended form in popular music while
Revolver (Beatles album) sitar. Author Peter Lavezzoli recognises the song as "the first conscious attempt in pop to emulate a non-Western form of music in structure and instrumentation". Aside from playing sitar on the track, Harrison's contributions included fuzztone-effected electric guitar. Everett identifies the song's change of metre as unprecedented in the Beatles' work and a characteristic that would go on to feature prominently on the band's subsequent album, "Sgt. Pepper's Lonely Hearts Club Band". Partly influenced by Harrison's experimentation with LSD, the lyrics address the singer's desire for "immediate sexual gratification", according to Womack, and serve as a "rallying call to accept