Karlheinz Stockhausen (German: [kaʁlˈhaɪnts ˈʃtɔkhaʊzn̩] ⓘ; 22 August 1928 – 5 December 2007) was a German composer, widely acknowledged by critics as one of the most important[1][2][3][4] but also controversial[5] composers of the 20th and early 21st cen...
(wikipedia)