Sgt. Pepper's Lonely Hearts Club Band album carried on the childhood and Liverpool theme with its circus and fairground effects, its pervading atmosphere of the traditional northern music hall that was in both its main creators' [McCartney and Lennon's] blood." "Sgt. Pepper" album cover was designed by the pop artists Peter Blake and Jann Haworth. Blake recalled of the concept: "I offered the idea that if they had just played a concert in the park, the cover could be a photograph of the group just after the concert with the crowd who had just watched the concert, watching them. If we did this by using cardboard
Experimental pop as "[seeming] to have done it all". Martin wrote that, along with the Rolling Stones' "Their Satanic Majesties Request" (1967), the Beatles' "Sgt. Pepper" "opened a space" for experimental pop which would be later filled by Jimi Hendrix, Jethro Tull, and the Who's "Tommy" (1968). Prior to "Sgt. Pepper", Gary Usher and Curt Boettcher were Los Angeles-based songwriters and producers who were interested in classical music and the avant-garde. Later cited as fixtures of sunshine pop, they worked together to create their debut studio album, "Present Tense" (1968). It was credited to Sagittarius, a studio group referred to as an