Source: The Romantic Generation (1995), Ch. 7 : Chopin: From the Miniature Genre to the Sublime Style
“Chopin's mazurkas stand apart from the rest of the considerable production inspired by folk music which reaches into all forms of Romantic music; they cannot conveniently be classified with any of the other manifestations. They are not arrangements of popular folk tunes, … He uses only fragments of melody, Polish formulas, typical national rhythms, and he combines them in his own way with great originality. From early on, Chopin's mazurkas are much more elaborate than the few modest pieces employing mazurka rhythms by Chopin's Polish predecessors, and they soon became the occasion for some of the most complex and pretentious of Chopin's forms.”
Source: The Romantic Generation (1995), Ch. 7 : Chopin: From the Miniature Genre to the Sublime Style
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Charles Rosen 69
American pianist and writer on music 1927–2012Related quotes
Source: The Social History of Art, Volume III. Rococo, Classicism and Romanticism, 1999, Chapter 6. German and Western Romanticism
Source: The Romantic Generation (1995), Ch. 6 : Chopin: Virtuosity Transformed

Without this you can’t play Chopin, you can’t play Mozart, and lastly absolutely not the Goldbergs.
Talkings on Bach

"The Relation of Jazz to American Music", in Henry Cowell (ed.) American Composers on American Music (1933); reprinted in Gregory R. Suriano (ed.) Gershwin in His Time (New York: Gramercy, 1998) p. 97.

Preface to Instructive ausgabe. Klavier-Etuden von Fr. Chopin, 1880.