Karlheinz Stockhausen (born August 22, 1928) is a German composer, and one of the most important and controversial composers of the 20th century. He is best known for his ground-breaking work in electronic music and controlled chance in serial composition. | Karlheinz Stockhausen (born August 22, 1928) is a German composer, and one of the most important and controversial composers of the 20th century. He is best known for his ground-breaking work in electronic music and controlled chance in serial composition. |