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
Sgt. Pepper's Lonely Hearts Club Band creative vision dominated at the expense of all commercial concerns. The album influenced Jefferson Airplane's "After Bathing at Baxter's", the Rolling Stones' "Their Satanic Majesties Request" and the Mothers of Invention's "We're Only in It for the Money", the last of which parodied the "Sgt. Pepper" cover collage. Everett characterises "Their Satanic Majesties Request" and the Small Faces' "Ogdens' Nut Gone Flake" as "Sgt. Pepper" "copycat LPs". During the 1970s, glam rock acts co-opted the Beatles' use of alter ego personas. In Moore's description, the album "seems to have spoken (in a way no other has) for its generation". It