Mauricio Kagel (born in Buenos Aires, December 24, 1931, died in Cologne, September 18, 2008) was an Argentine composer who has lived in Germany for most of his career. He was most famous for his interest in developing the theatrical side of musical performance. Many of his pieces give specific theatrical instructions to the performers, such as to adopt certain facial expressions while playing, to make their stage entrances in a particular way, to physically interact with other performers and so on.
Luigi Nono (29 January 1924 - 8 May 1990) was an Italian composer. He studied at the Venice Conservatoire where he became acquainted with serialism. (He married Arnold Schönberg's daughter Nuria in 1955). He became a leading composer of instrumental and electronic music. In 1950, he attended the "Ferienkurse für neue Musik" in Darmstadt, where he met composers such as Edgard Varèse and Karlheinz Stockhausen. Works from this first period include: Polifonica-Monodica-Ritmica (1951), Epitaffio per Federico García Lorca (1952-1953), La victoire de Guernica (1954) and Liebeslied (1954).