His earlier compositions employed serial technique, but beginning in the late 1960s he turned to a freer form of chromatic atonality. He was "perhaps the first Mexican-American composer of classical music to earn an international reputation."[1]
Works (selective list)
Piano Sonata no. 1 (1954)
Sinfonia sacra (1954/59)
Chamber Concerto for Cello and 12 Winds (1957–58/78)
Prometheus, opera, after Aeschylus (1960)
String Quartet no. 1 (1962)
Three Movements for Five Winds, for wind quintet (1967–68)
Rêve parisien (text: Baudelaire), for soprano and string quartet (1971–72)
Concerto for Piano and Orchestra (1975)
Piano Sonata no. 3 (1979)
String Quartet no. 2 (1983)
Music for Strings (1983)
Sources
Hitchcock, H. Wiley and Michael Meckna. 2001. "Cortés, Ramiro". Grove Music Online ed. L. Macy (Accessed 28 June 2007), <http://www.grovemusic.com> (subscription access).
Pitt, Roland Charles. 1990. "The Piano Music of Ramiro Cortés." DMA Dissertation. Austin: University of Texas.