Issues : Authentic corrections of FE

b. 14

composition: Op. 27 No 2, Nocturne in D♭ major

e flat2-g flat2 in A, FE (→EE) and GE2

g flat2-b flat2 in GE1

..

 GE1 has mistakenly g flat2-b flat2as the 5th third of the sextupletChopin corrected that mistake when proofing GE (→EE), the correct text was also put in GE2.

category imprint: Differences between sources

issues: Errors in GE , Authentic corrections of FE

b. 15

composition: Op. 27 No 2, Nocturne in D♭ major

 from the 2nd semiquaver in A, FE (?) and EE

 from the 1st semiquaver in GE (→FE ?)

..

The extent of   in A matches the authentic phrasing. In GE the sign begins earlier, which Chopin perhaps corrected in FE (→EE).

category imprint: Graphic ambiguousness; Differences between sources

issues: Inaccuracies in GE , Authentic corrections of FE

b. 17

composition: Op. 27 No 2, Nocturne in D♭ major

The last note B double flat  in FE (→EE)

The original e flat in A (→GE)

..

The first one of several corrections made by Chopin in the accompaniment in that movement of the Nocturne, introduced to FE. Cf. bars 19 and 25, as well as changes and additions in bars 18-22.

category imprint: Differences between sources; Corrections & alterations

issues: Accompaniment changes , Authentic corrections of FE

b. 18

composition: Op. 27 No 2, Nocturne in D♭ major

Emphasizing the bass note in FE

Bass note not emphasized in A (→GE)

Change of accent type in EE

..

When proofing FE, Chopin made the notation of the accompaniment more precise - cf. bar 20. In EE, the long accent was arbitrarily replaced with a vertical one. 

category imprint: Differences between sources; Corrections & alterations

issues: Accompaniment changes , Authentic corrections of FE

b. 19-20

composition: Op. 27 No 2, Nocturne in D♭ major

A slur added by Chopin when proofing FE (→EE)

An earlier version of A (→GE)

category imprint: Differences between sources; Corrections & alterations

issues: Authentic corrections of FE