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b. 16

composition: Op. 29, Impromptu in A♭ major

..

We add a cautionary natural next to g1. The sign was already added in GE2 (→GE3GE4).

category imprint: Differences between sources; Editorial revisions

issues: GE revisions , Cautionary accidentals

b. 16

composition: Op. 29, Impromptu in A♭ major

..

The cautionary natural next to g1 is included in A (→GE) and FE. EE is lacking the sign; it cannot be excluded that it was deleted due to its redundancy, which is indicated by the gap between the notes and signs of possible proofing.

category imprint: Differences between sources; Corrections & alterations

issues: Cautionary accidentals

b. 16

composition: Op. 29, Impromptu in A♭ major

..

In A (→GE1) and EE1 there is no natural restoring g on the last quaver. It is undoubtedly Chopin's oversight, one of his most frequent ones. The sign was added in GE2 (→GE3GE4) and EE2. It can be assumed that also the natural in FE was added during the proofing (it is absent in the analogous bar 98).

category imprint: Interpretations within context; Differences between sources

issues: Omissions to cancel alteration

b. 17

composition: Op. 29, Impromptu in A♭ major

..

In A (→GE1) the 5th and 6th quavers (f1 and g1) have superfluous accidentals (in FE only g1), whereas the unnecessary natural in EE appears also before the 4th quaver c2. Those are the remains of original notation of the 1st crotchet in that bar.

category imprint: Source & stylistic information

issues: Errors resulting from corrections

b. 17

composition: Op. 29, Impromptu in A♭ major

..

On the 8th quaver in A, FE and EE1 there is no natural reinstating f1. Chopin corrected his mistake in FEJ and FES. The sign was also added in GE and EE2.

category imprint: Interpretations within context; Differences between sources

issues: Omissions to cancel alteration