1978. Sven-Erik Bäck was in his versitality unique among Swedish composers. Since his debut in the 1940´s, he was regarded as a radical avantgardist and since Bäck was also a performer, the musical result became most interesting. Since his first electronic work – In Principio (1970) Bäck produced many electronic as well as instrumental and vocal compositions. He also combined music with other media such as dance and visual art. “Through the Earth through the Sea”. “Walls”. “Hommage aux grands faux-penseurs…”. “Organ Butterfly”.