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 the preceding one. Martin said he spliced the sound of a chicken clucking at the end of the track to overlap with a guitar being tuned in the next one, making a seamless transition between the two songs. "Sgt. Pepper's Lonely Hearts Club Band (Reprise)" serves as a bookend for the album and a segue to its finale. The hard-rocking song was written after the Beatles' assistant, Neil Aspinall, suggested that since "Sgt. Pepper" opened the album, the fictional band should make an appearance near the end. The reprise omits the brass section from the title track and features a