Dieter Roth (1930 to 1998) was a German-Swiss artist of restless range, celebrated for his books, prints, drawings and sculptures made from chocolate, sausage and other decaying matter, and a central, anarchic figure of postwar European art. Sound was one more of his materials, made in the same spirit of accumulation and chance. His records document endless piano improvisation, barking-dog choruses, spoken diaries and the collaborative racket of the group Selten gehörte Musik, in which artist friends played instruments they could not play.

Dieter Roth (1930 to 1998) was a German-Swiss artist of restless range, celebrated for his books, prints, drawings and sculptures made from chocolate, sausage and other decaying matter, and a central, anarchic figure of postwar European art. Sound was one more of his materials, made in the same spirit of accumulation and chance. His records document endless piano improvisation, barking-dog choruses, spoken diaries and the collaborative racket of the group Selten gehörte Musik, in which artist friends played instruments they could not play.