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b. 39-42

composition: Op. 10 No 10, Etude in A♭ major

No pedalling in A

Pedalling in FE (→GE,EE)

..

The pedalling was added – probably by Chopin – in a proofreading of FE (→GE,EE).

category imprint: Differences between sources

issues: Authentic corrections of FE

b. 39

composition: Op. 10 No 10, Etude in A♭ major

f1 in A

a1 in FE (→GE,EE)

..

The f1 quaver written in A was changed to a1 in a proofreading of FE (→GE,EE). According to us, there is no doubt that the proofreading was performed by Chopin, who also corrected a mistake on the last quaver in the R.H. and added the pedalling in the same bar.

category imprint: Differences between sources

issues: Authentic corrections of FE

b. 39

composition: Op. 10 No 10, Etude in A♭ major

Octave in A

Sixth in FE (→GE,EE)

..

Despite the fact that the a2-a3 octave is possible as far as the sound is concerned (cf. the Prelude in F minor, Op. 28 No. 8, bars 6 and 20), Chopin's mistake seems to be almost certain here, even due to the pianistic issues. The conclusion is confirmed by Chopin's proofreading performed in this place in FE (→GE,EE). 

category imprint: Interpretations within context; Differences between sources

issues: Terzverschreibung error , Errors in the number of ledger lines , Errors of A , Authentic corrections of FE

b. 40

composition: Op. 10 No 10, Etude in A♭ major

..

In A (→FE) there is no  raising d2 to d2 on the 5th quaver and the  lowering g1 to g1 on the 11th quaver. These patent errors were corrected in GE and EE.

category imprint: Interpretations within context; Differences between sources

issues: EE revisions , Accidentals in different octaves , GE revisions , Omission of current key accidentals , Errors of A

b. 41-42

composition: Op. 10 No 10, Etude in A♭ major

Accents in A

FE (→GE,EE)

..

Different arrangement of the accents in FE (→GE,EE) is most probably a result of Chopin's intervention, although it is uncertain whether the composer moved the more or less accurately reproduced accents of A or only added – in another place – the marks omitted by the engraver.

category imprint: Differences between sources

issues: Long accents , Authentic corrections of FE