Collage In music, with the advances on recording technology, avant-garde artists started experimenting with cutting and pasting since the middle of the twentieth century. In the 1960s, George Martin created collages of recordings while producing the records of The Beatles. In 1967 pop artist Peter Blake made the collage for the cover of the Beatles seminal album "Sgt. Pepper's Lonely Hearts Club Band". In the 1970s and 1980s, the likes of Christian Marclay and the group Negativland reappropriated old audio in new ways. By the 1990s and 2000s, with the popularity of the sampler, it became apparent that "musical collages" had
Progressive pop of author Simon Philo, the Beatles' progressive pop was exemplified in the double A-sided single "Strawberry Fields Forever" / "Penny Lane" (1967). In a further example of the reciprocal influences between themselves and the Beach Boys, the Beatles demonstrated "paradoxical lyrical content matched by music that was at once 'young' and 'old', rock and Tin Pan Alley, LSD and cocoa, progressive and nostalgic" – all features that were shared on "Sgt. Pepper's". Musicologist Allan Moore writes: "At that time, "Sgt. Pepper" seemed to mark rock music's coming of age ... Now, of course, with jaded memories, we think of it