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
Concept album Moore says that "Even though previous albums had set a unified mood, it was on the basis of the influence of "Sgt. Pepper" that the penchant for the concept album was born." Adding to "Sgt. Pepper"s claim, the artwork reinforced its central theme by depicting the four Beatles in uniform as members of the Sgt. Pepper band, while the record omitted the gaps that usually separated album tracks. Author Bill Martin relates the assumed concept albums of the 1960s to progressive rock: "Popmatters" Sarah Zupko notes that while the Who's "Tommy" is "popularly thought of as the first rock opera,