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Op. 25 No 12, Etude in C minor

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b. 8

composition: Op. 25 No 12, Etude in C minor

a in FC (→GE) & EE2 (→EE3)

a in FE & EE1
..

It is hard to assume how the difference between the versions of FE and EE1 and these of FC (→GE) and EE2 (→EE3) occurred. In FC, the naturals introducing a are written by the copyist, which means that they were present in the manuscript, probably an autograph copied by Fontana. Therefore, the absence of these signs in FE and EE1 could be explained by their later deletion by Chopin in the base texts to these editions. Hence a regular, chromatic progression of minor thirds in the middle voices would be then introduced only in bar 54 as a kind of variation of the repetition of this place. However, not being certain if it was so – the versions of FE and EE1 could have been results of mistakes – in the main text we give the undoubtedly authentic version of FC (→GE). 

category imprint: Differences between sources

issues: EE revisions , Errors in FE , Errors in EE , Last key signature sign

b. 11

composition: Op. 25 No 12, Etude in C minor

..

FE has an f1 instead of a1 as the 8th semiquaver in the L.H. The engraver's error is proved by the compatible version of the remaining sources, the version of analogous bar 3 and a correction written in pencil in FES. 

category imprint: Interpretations within context; Differences between sources

issues: Annotations in teaching copies , Errors in FE , Terzverschreibung error , Annotations in FES

b. 13

composition: Op. 25 No 12, Etude in C minor

F in FC, FE, EE & GE2 (→GE3)

G in GE1
..

The version of GE1 is almost certainly an error of the engraver, corrected in GE2 (→GE3).

category imprint: Differences between sources

issues: Errors in GE , GE revisions

b. 14

composition: Op. 25 No 12, Etude in C minor

..

The cautionary  before d is included in EE and GE. The sign in EE may be authentic, yet an editorial revision is more likely, same as in GE.

category imprint: Differences between sources

issues: EE revisions , GE revisions , Cautionary accidentals

b. 14

composition: Op. 25 No 12, Etude in C minor

d in FC (→GE) & FE

f in EE
..

EE has an f instead of d as the penultimate semiquaver in the L.H. A possible mistake is indicated by the compatible version – with d – in analogous bar 70.  

category imprint: Differences between sources

issues: Errors in EE , Terzverschreibung error