Mexican composer. He was one of the primary composers from Mexico in the 1960’s to the 1980’s. His compositions number over one hundred and fifteen and includes solo, chamber, electronic and orchestra music, cantatas (vocal compositions with instrument accompaniment), and works for film. His early music was considered to have a pentatonic (scale of five notes) classical style of Mexican nationalism, with folk like tunes, and strong rhythms. His works included: Suite for violin and piano, String quartet no. 1, Klangfarbenmelodie, Transicion, Ambivalencia, String quartet no. 2, and Diptico I.