| Argentine composer, known for
combining nationalistic musical idioms with 20th-century techniques. Born
and trained in Buenos Aires, he taught at several Argentine conservatories
and in 1971 moved to Geneva. He developed a personal synthesis of compositional
procedures that draws on serial and chance methods of organization and utilizes
microtones (intervals smaller than a half step), as well as using more traditional
forms. His Second String Quartet, first performed at the first Interamerican
Music Festival (1958), won him international stature. With his chamber opera
Bomarzo (1967) he was recognized as a leading 20th-century composer of opera.
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