Cassiber were a German avant-rock group founded in 1982 by German composer and saxophonist Alfred Harth, German composer, music-theatre director and keyboardist Heiner Goebbels, English drummer Chris Cutler from Henry Cow and German guitarist Christoph Anders. They recorded five albums, toured extensively across Europe, Asia and North America, and disbanded in 1992.
Cassiber's music was a blend of speed-punk, free jazz and sampling which incorporated found sounds and news broadcasts. They were best known for the "frantic intensity" of their live performances. A Time Out critic wrote, "Cassiber play as if they only have a minute left to live." They were also noted for their style of playing, which was to "improvise 'completed pieces'".