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b. 8

composition: Op. 29, Impromptu in A♭ major

..

EE is lacking in naturals raising d1 to din the 2nd quaver in the L.H. and d1 to din the 6th quaver in the R.H. The mistake was corrected in EE2.

category imprint: Differences between sources

issues: Errors in EE

b. 9

composition: Op. 29, Impromptu in A♭ major

..

Before the last cin the R.H. in A there is a natural written by someone else. The sign was printed in GE1 and deleted in GE2 (→GE3GE4). FE and EE are lacking it.

category imprint: Differences between sources; Corrections & alterations

issues: GE revisions , Foreign hand additions in manuscripts , Cautionary accidentals

b. 10

composition: Op. 29, Impromptu in A♭ major

..

We add a cautionary flat next to e2 on the 2nd quaver. The addition was already introduced into GE2 (→GE3GE4).

category imprint: Differences between sources; Editorial revisions

b. 10

composition: Op. 29, Impromptu in A♭ major

..

In A the 3rd quaver was changed twice: from e1 to cand back to e1. In A, the rejected version with cin the base text for EE was not corrected by Chopin. FE also has the final version (e1). 

category imprint: Differences between sources; Corrections & alterations

issues: Corrections in A , Chopin's hesitations , Accompaniment changes

b. 10

composition: Op. 29, Impromptu in A♭ major

..

We add a cautionary flat next to the grace note a2. The addition was already added in EE.

category imprint: Differences between sources; Editorial revisions