Question: Strahlen (Rays) for a percussionist (vibraphone and/or glockenspiel) and ten-channel sound recording is a composition by which German composer, widely acknowledged by critics as one of the most important ; but also controversial composers of the 20th and early 21st centuries?
Sentence (from "Karlheinz Stockhausen"): He is known for his groundbreaking work in electronic music, for introducing controlled chance (aleatory techniques or aleatoric musical techniques) into serial composition, and for musical spatialization.
Relevant evidence: No