Osvaldo Costa de Lacerda (March 23, 1927 – July 18, 2011) was a Brazilian composer and professor of music. Lacerda is known for a Brazilian nationalist musical style that combines elements of Brazilian folk and popular music as well as twentieth-century art music, as exemplified in the works of his teacher M. Camargo Guarnieri (1907–1997). His compositional output includes works for orchestra, choir, smaller vocal and instrumental ensembles, voice and piano, solo instrument and piano, solo piano, and other solo instruments. He received several musical awards during his lifetime, including the John Simon Guggenheim Memorial Foundation Fellowship, and contributed significantly to the training of younger musicians in Brazil as a professor of composition and theory, member of various musical organizations and societies, and author of textbooks for theory, ear training, and notation.

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