Issues : Enharmonic corrections

b. 24

composition: Op. 10 No 11, Etude in E♭ major

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In A there is no  before the topmost note. It is a result of an oversight in the change of notation of this chord from f1-c1-f2 to e1-c2-e2. The accidental was already added in FE (→GE,EE). 

category imprint: Interpretations within context; Differences between sources; Corrections & alterations

issues: Corrections in A , Errors resulting from corrections , Enharmonic corrections , Authentic corrections of FE

b. 24

composition: Op. 63 No. 3, Mazurka in C# minor

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In FE (→EE) there is a  to the d quaver. As notes at this pitch are not subject to any alterations both before and after (until bar 32), in the main text we remove the unnecessary accidental. An identical revision was performed also by GE. According to us, the  may be a remaining element of the initial version of this motif, with d as the first quaver. 

category imprint: Differences between sources; Editorial revisions

issues: Cautionary accidentals , Enharmonic corrections

b. 25-26

composition: Op. 10 No 2, Etude in A minor

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In the 1st half of bar 25 CLI includes the clearly earlier notation with the use of sharps instead of flats (d3 and a2 instead of e3 and b2). The notation was not repeated by Chopin in any of the remaining sources. Moreover, in three situations CLI does not refer to the sharp put before the previous note – naturals before the 9th semiquaver in both bars and the 13th semiquaver in bar 25 are missing. Only the last situation may be considered as an obvious error, as in the first two cases the inaccuracy is not striking due to the octave sign, which ends in the middle of the bar, as a result of which, the devoid of the sign note is one octave higher than the previous one (the same inaccuracy occurs in Ap in bar 26).

category imprint: Interpretations within context; Differences between sources

issues: Enharmonic corrections , Errors of CLI

b. 26

composition: Op. 10 No 2, Etude in A minor

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The third note is written in Ap as dand not c3. In the version for printing Chopin conserved the original notation.

category imprint: Differences between sources

issues: Chopin's hesitations , Enharmonic corrections

b. 27

composition: Op. 29, Impromptu in A♭ major

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Chopin started to write the 4th quaver in A as a c2, however, he eventually opted for a d2, converting the originally written head of the note into a double flat.

category imprint: Corrections & alterations

issues: Corrections in A , Enharmonic corrections