Select: 
Category
All
Graphic ambiguousness
Interpretations within context
Differences between sources
Editorial revisions
Corrections & alterations
Source & stylistic information
Notation
All
Pitch
Rhythm
Slurs
Articulation, Accents, Hairpins
Verbal indications
Pedalling
Fingering
Ornaments
Shorthand & other
Importance
All
Important
Main


b. 48-49

composition: Op. 25 No 1, Etude in A♭ major

No slur in AI, A (→CDP,GE) & EE

Slur in FE

..

Chopin could have added the slur in the L.H. while proofreading FE. This kind of revision is highly unlikely in this edition.

category imprint: Differences between sources; Corrections & alterations

issues: Authentic corrections of FE

b. 48-49

composition: Op. 25 No 1, Etude in A♭ major

A (→CDP,GE), FE & EE

..

Interpretation of the written in pencil ending of the Etude is impeded in AI by limited resolution of the preserved photography. Originally, the piece ends in bar 48: . Chopin then added in pencil an additional bar, yet interpretation of the details of the part of the L.H., which seems to be edited differently than in A and editions, is not entirely certain.

category imprint: Graphic ambiguousness; Differences between sources; Corrections & alterations

issues: Changed phrase length

b. 48

composition: Op. 25 No 1, Etude in A♭ major

..

The wavy line in the indication of the trill, in spite of being entirely clear in A, was not included in any of the sources.

category imprint: Differences between sources

issues: Inaccuracies in GE

b. 48-49

composition: Op. 25 No 1, Etude in A♭ major

..

In AI there are no pedalling marks in these bars. The absence of  cancelling the pedal taken at the beginning of bar 44 is not surprising in the original, shorter version of the ending (see another note to bars 48-49). Holding the pedal until the end of the piece is, however, possible also after considering the ending written in AI, so that the absence of indications in this autograph does not have to be considered as an oversight.

category imprint: Differences between sources; Corrections & alterations

issues: No pedal release mark

b. 48-49

composition: Op. 25 No 1, Etude in A♭ major

Slur in AI, A (→CDP,GE) & EE

Longer slur in FE

..

The slur of FE, most probably erroneous, could have corresponded, to a certain extent, to the notation of the base text – written with panache, reaching far beyond the rests slurs are not infrequent in Chopin's autographs (e.g., in the Mazurka in G minor, Op. 24 No. 1, bars 16 and 18), not to mention Gutmann's copies (e.g., in the Scherzo in C minor, Op. 39, bar 56). Who knows whether the slur added in the part of the L.H. was not supposed to be a sui generis correction of the inaccurate slur of the R.H.

category imprint: Interpretations within context; Differences between sources

issues: Inaccuracies in FE