'''Étude Op. 10, No. 4''', in C-sharp minor, is a study for solo piano composed by Frédéric Chopin in 1830. It was first published in 1833 in France,("[http://www.cfeo.org.uk/jsp/browsecollection.jsp French edition]"). Paris: M. Schlesinger, June 1833. Germany,("[http://www.cfeo.org.uk/jsp/browsecollection.jsp German edition]"). Leipzig: Fr. Kistner, August 1833 . and England("[http://www.cfeo.org.uk/jsp/browsecollection.jsp English edition]"). London: Wessel & Co, August 1833. as the fourth piece of his ''Études Op. 10''. This passionate study, a very fast ''Presto con fuoco'', features continuous sixteenth notes (semiquavers), in perpetuum mobileLeichtentritt, Hugo. "Die Etüden." In ''[https://archive.org/details/agf2835.0001.001.umich.edu Analyse der Chopin'schen Klavierwerke]'' [Analysis of Chopin's Piano Works]. Band II. Berlin: Max Hesses Verlag, 1922, p. 100. fashion involving both hands.