Outsider music: classics of American classical music (48) - Walter Piston - Fantasy for English Horn, Harp & Strings (1952) Walter Piston - Fantasy for English Horn, Harp, & Strings (Score Video) [1952] One of the great academics of 20th-century America, as well as a renowned teacher, his harmony manual is still one of the most famous in the world (the "Piston"). Quite traditional for most of his career, he experienced a reevaluation in later life that led him to compose more modernist works.