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b. 48

composition: Op. 25 No 11, Etude in A minor

..

In GC and FE there is no  raising f to f. This patent oversight of Chopin was corrected in GE. EE also includes the correct text, which is most probably a result of an editorial revision.

category imprint: Interpretations within context; Differences between sources

issues: GE revisions , Omission of current key accidentals

b. 50

composition: Op. 25 No 11, Etude in A minor

..

In GC, FE and EE1 (→EE2) there is no  returning a2. This patent inaccuracy was corrected in GE and EE3.

category imprint: Interpretations within context; Differences between sources

issues: EE revisions , Errors in FE , Errors in EE , Omissions to cancel alteration , GE revisions , Errors of GC

b. 50

composition: Op. 25 No 11, Etude in A minor

..

We add a  before fto two authentic cautionary naturals, before g1 and c2. The sign was added already in GE2 (→GE3), together with a few others: before c1b2 and the F-octave in the L.H.

category imprint: Differences between sources; Editorial revisions

issues: GE revisions , Cautionary accidentals

b. 52

composition: Op. 25 No 11, Etude in A minor

..

Before the penultimate semiquaver, b2, GC (→GE1) has an unnecessary . The sign was removed in GE2 (→GE3) and added – most probably on the basis of GE1 – in EE3.

category imprint: Differences between sources

issues: EE revisions , GE revisions , Cautionary accidentals

b. 52

composition: Op. 25 No 11, Etude in A minor

..

In the main text, in the 1st half of the bar we add cautionary naturals in the part of both hands. The signs – in a slightly different set (before the 2nd, 3rd and 4th semiquaver in the R.H. and before the 2nd octave in the L.H.) – were added already in GE2 (→GE3).

category imprint: Differences between sources; Editorial revisions

issues: GE revisions