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b. 21

composition: Op. 42, Waltz in A♭ major

..

EE has a superfluous cautionary  next to a.

category imprint: Differences between sources

issues: EE revisions

b. 27-28

composition: Op. 42, Waltz in A♭ major

..

The cautionary  of din bar 27 occurs in the majority of the sources (the sign was removed only in GE3). It is probably a mistake, while the sign – completely redundant in this place – was supposed to be in bar 28, where it is justified. The  in bar 28 was added in GE1 (→GE2GE3).   

category imprint: Differences between sources

issues: Errors in FE , GE revisions , Cautionary accidentals

b. 29-37

composition: Op. 42, Waltz in A♭ major

..

In bars 29 and 37 EE has an unnecessary cautionary  next to a.

category imprint: Differences between sources

issues: EE revisions

b. 30

composition: Op. 42, Waltz in A♭ major

..

GE1 has an unnecessary cautionary  next to a2. The sign was removed already in GE2 (→GE3).

category imprint: Differences between sources

issues: Cautionary accidentals

b. 31

composition: Op. 42, Waltz in A♭ major

e in FE

E in GE & EE

..

At the beginning of the bar FE has an e. Chopin changed it to E both in FEG (→GE) and in the base text to EE. Cf. a similar line of the bass in the Waltz in Cminor, Op. 64 No. 2, bars 38-40.

category imprint: Differences between sources; Corrections & alterations

issues: Accompaniment changes