Lewin analyzes four 20th-century pieces ("Simbolo" from Dallapiccola's "Quaderno Musicale di Annalibera"; Stockhausen's "Klavierstuck III"; Webern's Op 10 No 4; and Debussy's "Feux d'Artifice"). He applies the conceptual framework from his work, "Generalized Musical Intervals and Transformations."
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