Question: HPSCHD is a composition by which music theorist and writer?
Sentence (from "Miguel Roig-Francolí"): His 1980 "Cinco piezas para orquesta" ("Five Pieces for Orchestra"), commissioned by Radio Nacional de España and written in a postmodern, neotonal style, won first prize in the National Composition Competition of the Spanish "Jeunesses Musicales" in 1981 and second prize at the UNESCO International Rostrum of Composers in 1982, and continues to be widely performed in Spain.
Relevant evidence: No