Feldman, Morton. (1926 - 1987) Autograph LetterExceedingly rare autograph letter from the influential American composer, a pioneer of indeterminate music, who works are characterized by notational innovations and a very particular sound: rhythms that seem to be free and floating; pitch shadings that seem softly unfocused; a generally quiet and slowly evolving music; recurring asymmetric patterns. Autograph Letter to the noted music administrator and author Renee Levine [Packer]. 1 page, ca. 315 x