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b. 15

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

..

In A, CDP, and FE, there is no  raising d1 to d1. This patent oversight was corrected in GE and EE. AI also includes the correct text.

category imprint: Interpretations within context; Differences between sources

issues: Accidentals in different octaves , Inaccuracies in FE , GE revisions , Omission of current key accidentals

b. 15

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

No sign in AI & CDP

 in A & FE

 in GE

 in EE

..

An accurate determination of the range of  hairpins in A is impeded by different length of the sign's arms and inaccurately aligned first figures in the left and right hands. We assume that the sign is graphically correlated to the 3rd and 15th semiquavers, belonging to a secondary melodic motif.

category imprint: Graphic ambiguousness; Differences between sources

issues: Inaccuracies in GE , Scope of dynamic hairpins , GE revisions , Unclear hairpins in A

b. 15

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

No sign in AI & CDP

Long accent in A, literal reading

 in A (contextual interpretation →GE1GE1a)

 in FE

 in EE & GE2 (→GE3)

..

The sign in A may be considered as a long accent, yet according to us, it is much more likely that Chopin had diminuendo hairpins in mind, closing the dynamic wave in this bar.

category imprint: Graphic ambiguousness; Differences between sources

issues: Long accents , Scope of dynamic hairpins , GE revisions

b. 16

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

..

In A, CDP, FE, and EE1, there is no  raising d2 to d2. This patent oversight was corrected in GE and EE2 (→EE3). AI also includes the correct notation.

category imprint: Interpretations within context; Differences between sources

issues: EE revisions , Errors in FE , Errors in EE , GE revisions , Omission of current key accidentals , Errors of A

b. 16

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

Six notes in AI, CDP, FE & EE

Five notes in A (→GE)

..

The version with the five-note group was created as a result of Chopin correction in A – the composer deleted the last semiquaver there. We consider this change to be final due to its undeniable advantages – the transition to the next bar is significantly smoother, as far as the harmony (preparing a new chord position), rhythm (transition to a new rhythmic formula), and piano technique (facilitating the change of the hand's position) are concerned. A similar change was introduced – probably at Chopin's request – in bar 34.

category imprint: Differences between sources; Corrections & alterations