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b. 40

composition: Op. 25 No 1, Etude in A♭ major

f1 in AI

e1 in A (→CDP,GE), FE & EE

..

In the preserved photography of AI, it is hard to state whether Chopin, while correcting the 16th note in the R.H., changed e1 to for the other way round. According to us, it is the second possibility that is more plausible, as the other changes visible in AI generally strive towards the versions written later in A. However, as the version with e1 is represented by the remaining sources, for AI we adopt f1, which at a certain stage of composing the Etude was certainly considered by Chopin. 

category imprint: Graphic ambiguousness; Differences between sources; Corrections & alterations

b. 40-41

composition: Op. 25 No 1, Etude in A♭ major

No marks in AI, A (→CDP,GE), FE & EE1

Accents in EE2 (→EE3)

..

The accents in the middle of each of these bars are certainly an addition of the reviser of EE2 (→EE3). Cf. bars 42-43.

category imprint: Differences between sources

issues: EE revisions

b. 40-42

composition: Op. 25 No 1, Etude in A♭ major

No indication in AI & CDP

in A (→GE) & EE

in FE

..

The dim. indication could have been added in A after preparing CDP. Lack of the dashes determining the range of its indication in FE is probably a result of the engraver's inaccuracy.

category imprint: Differences between sources; Corrections & alterations

issues: Inaccuracies in FE

b. 40-41

composition: Op. 25 No 1, Etude in A♭ major

No markings in AI

 in A (→GE), FE & EE

..

The whole-bar pedals of AI is the original concept, detailed by Chopin at the time of preparing the Etude for publication.

category imprint: Differences between sources; Corrections & alterations

b. 40

composition: Op. 25 No 1, Etude in A♭ major

A1 in AI

A in A (→CDP,GE), FE & EE

..

In AI, Chopin introduced A first, same as in the final version, then he changed it to A1. While preparing the Etude for print, he, however, returned to the original concept, choosing eventually A.

category imprint: Differences between sources; Corrections & alterations

issues: Chopin's hesitations , Deletions in A