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An extraordinary concert etude for the solo piano "THE STANZAS OF THE DEVIL", which has Polyrhythm and Polytonality. The exploration of this work will be an honor for every pianist!
more info: https://tsanoff-classic.com/piano.etudes.php
buy a copy: https://www.amazon.com/Concert-etude-solo-piano-No-6/dp/1977858120/ref=sr_1_1?s=books&ie=UTF8&qid=1530677861&sr=1-1