Karlheinz Stockhausen

Karlheinz Stockhausen (22 August 1928 – 5 December 2007) was a German composer, widely acknowledged by critics as one of the most important but also controversial composers of the twentieth and early twenty-first centuries. Another critic calls him "one of the great visionaries of 20th-century music" (Hewett 2007). He is known for his ground-breaking work in electronic music, aleatory (controlled chance) in serial composition, and musical spatialization.