Cornelius Cardew (7 May 1936 – 13 December 1981) was an English experimental music composer, and founder (with Howard Skempton and Michael Parsons) of the Scratch Orchestra, an experimental performing ensemble. He later rejected experimental music, explaining why he had "discontinued composing in an avantgarde idiom" in his own programme notes to his Piano Album 1973 in favour of a politically motivated "people's liberation music".
Cardew was born in Winchcombe, Gloucestershire. He was the second of three sons whose parents were both artists—his father was the potter Michael Cardew. The family moved to Wenford Bridge Pottery Cornwall a few years after his birth where he was later accepted as a pupil by the Canterbury Cathedral School which had evacuated to the area during the war due to bombing. His musical career thus began as a chorister. From 1953 to 1957, Cardew studied piano, cello, and composition at the Royal Academy of Music in London.
In 1957, Cardew performed in the British premiere of Pierre Boulez's Le marteau sans maître (having learnt to play the guitar for the occasion as no professional guitar player was available). Having won a scholarship to study at the recently established Studio for Electronic Music in Cologne, Cardew served as an assistant to from 1958 to 1960. He was given the task of independently working out the composition plans for the German composer's score , and Stockhausen noted:
As a musician he was outstanding because he was not only a good pianist but also a good improviser and I hired him to become my assistant in the late 50s and he worked with me for over three years. I gave him work to do which I have never given to any other musician, which means to work with me on the score I was composing. He was one of the best examples that you can find among musicians because he was well informed about the latest theories of composition as well as being a performer.