Giacinto Scelsi, Count of Ayala Valva (January 8, 1905 – August 9, 1988), was an Italian composer. He is best known for writing music based on only one pitch, such as "Quattro pezzi su una nota sola" ["Four pieces each on a single note"] (1959). He also wrote surrealist poetry in French. Born in La Spezia, Italy, Scelsi studied music first in Rome, and later in Vienna, with a disciple of Arnold Schönberg. Subsequently Scelsi became one of the first adepts of dodecaphony in Italy.

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