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Rhythm

b. 1

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

in FC, EE & GE2 (→GE3)

in FE & GE1

..

The use of  time signature surprises only in GE1, as in FE the  indication was not used in the Etudes – contrary to the manuscripts – at all, neither in Op. 25 nor in Op. 10 and the Etude in F minor, Dbop. 36 No. 1 (cf. also the Impromptu in A major, Op. 29). In any case, the correctness and authenticity of the  time signature is unquestionable due to the compatible version of FC and EE. The correct time signature was returned in GE2 (→GE3). 

category imprint: Differences between sources

issues: Changes of metre , Inaccuracies in GE , Inaccuracies in FE , GE revisions , 4/4 or 2/2

b. 24

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

Crotchet c1 in FC (→GE), FE & EE3

Semiquaver c1 in EE1 (→EE2)

..

The missing crotchet stem in EE1 (→EE2), extending c1, is certainly a mistake, corrected in EE3.

category imprint: Differences between sources

issues: EE revisions , Errors in EE

b. 78-80

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

Crotchets in bars 78 & 80 in FC

Crotchets in bar 80 in FE

Crotchets in bar 78 in EE1 (→EE2)

Crotchets & quavers in GE & EE3

..

The separation and extension of the sound of the c1 and d1 notes is marked in both analogous bars – bars 78 and 80 – only in FC (→GE with the d1 note shortened to a quaver), which has to be considered to be an inaccuracy of the remaining sources. In turn, it is uncertain whether the rhythmic value of the d1 notes, exceeding the bar, corresponds to Chopin's intention, as the lack of quaver flags can be considered here to be an oversight (this is how it was interpreted in GE). Due to the fact that we can encounter such a type of notation in other Chopin's pieces (cf. the Etude in A minor, No. 4, bar 52 or in E minor, No. 5, bar 35), in the main text we preserve the crotchets written in FC.

category imprint: Differences between sources

issues: EE revisions , GE revisions