The document discusses the 2001 album "Since I Left You" by the Australian electronic music group The Avalanches. The album is composed entirely of samples from other songs and sources, using over 3,500 vinyl samples. It was originally conceived as a concept album about an international love story. Two tracks from the album, "Since I Left You" and "Frontier Psychiatrist" are highlighted as examples of the wide range of samples used. The document also discusses how dubstep music has furthered the postmodern tradition of extensive sampling and remixing of existing music.