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
Album cover a design (a Leonardo sketch) could be seen. "Magical Mystery Tour" by the Beatles was first released as a double EP with a booklet between the records. "Sgt. Pepper" contained a cardboard sheet of images, and "The Beatles" (often referred to as the White Album) contained four large glossy photos of the individual Beatles along with a poster-sized collage. "Live at Leeds" by The Who also contained a generous supply of posters and printed material. "Led Zeppelin III" had a front cover that contained a revolving disc which brought different images into view through small cut-outs in the outer sleeve.