Pulitzer Prize-winning Argentine-American composer who came to the United States in 1960. He was elected to the American Academy of Arts and Letters in 1982.
His first musical lessons were on the violin, which he began at age seven. He dove into composing at age 13. He studied composition theory at the University of Buenos Aires with Guillermo Graetzer.
He won the Pulitzer Prize in 1971 for his composition "Synchronisms No. 6," which used both acoustic and electroacoustic instruments.
His family emigrated to Argentina from Lithuania. He and Ellen Blaustein were married in 1961.
He studied with Aaron Copland at the Berkshire Music Center, which later became the Tanglewood Music Center.