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Pitch

b. 7-15

composition: Op. 25 No 4, Etude in A minor

..

At the beginning of bars 7 and 15 we add cautionary naturals before and g. The signs before the 1st quaver in both bars were introduced in GE and EE3, before the second – only in GE2 (→GE3).

category imprint: Differences between sources; Editorial revisions

issues: EE revisions , GE revisions

b. 8

composition: Op. 25 No 4, Etude in A minor

..

In EE there is no  returning f2 (despite the presence of – as in the remaining sources – cautionary  before g2). It is most probably an oversight of the engraver or copyist performing the base text to EE.

category imprint: Interpretations within context; Differences between sources

issues: Errors in EE , Cautionary accidentals

b. 12

composition: Op. 25 No 4, Etude in A minor

Sixth in A (→FE,FCGE1) & EE

Triad in GE2 (→GE3)

..

Adding on the 2nd quaver is undoubtedly an arbitrary decision of the reviser of GE2 (→GE3).

category imprint: Differences between sources

issues: GE revisions

b. 13

composition: Op. 25 No 4, Etude in A minor

..

FE has an erroneous instead of as the 3rd quaver. This patent error could have been provoked by an inaccurate placement of this note in A. The mistake was corrected – perhaps by Chopin – in FED.

category imprint: Interpretations within context; Differences between sources

issues: Annotations in teaching copies , Errors in FE , Annotations in FED , Inaccurate note pitch in A , Inaccuracies in A

b. 15

composition: Op. 25 No 4, Etude in A minor

..

In GE1, the  before the last third was misplaced next to the bottom note. The error was corrected in GE2 (→GE3).

category imprint: Differences between sources

issues: Errors in GE , GE revisions