sentences:  Subsequently, he studied musicology and ethnomusicology at the University of Vienna, where he received a Ph.D. in 1991 with a dissertation titled "Die Auswirkungen der Volksliedforschung auf das kompositorische Schaffen von Béla Bartók".In 1969 in Seoul, together with Isang Yun, Nam June Paik, and Sukhi Kang, he helped organize the "Biennale for Contemporary Music", where new Western music was performed for the first time in Korea (Stockhausen, Pierre Boulez, Herbert Eimert, John Cage, Roman Haubenstock-Ramati, etc.