Issues : Omissions to cancel alteration

b. 7-8

composition: Op. 10 No 10, Etude in A♭ major

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The natural raising a1 to a1 in bar 7 and the  returning d1 in bar 8, omitted in A, were added in a proofreading of FE (→GE,EE).

category imprint: Interpretations within context; Differences between sources

issues: Accidentals in different octaves , Omissions to cancel alteration , Authentic corrections of FE , Inaccuracies in A

b. 8

composition: Op. 10 No 10, Etude in A♭ major

e2 in A (→FE) (literal reading)

e2 in GE & EE

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A lacking  before the penultimate quaver is most probably a mistake by Chopin. The accidental was added by the revisers in both GE and EE.

category imprint: Differences between sources

issues: EE revisions , Omissions to cancel alteration , GE revisions , Errors of A

b. 35

composition: Op. 10 No 10, Etude in A♭ major

d2 & d3— contextual interpretation of A, and FE (→EE)

d2 & d3 in GE

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Lack of accidentals before the 5th pair of quavers in A means that Chopin either forgot to put a  next to the upper note of the sixth (d3), or a  one quaver earlier (d2). In a proofreading of FE (→EE) a flat was added, which is most probably a result of Chopin's intervention. Due to this fact, we give this version in the main text. In GE the flat was not included (probably it was not yet present in the proof copy of FE on which GE was based), yet a  raising d2 to dwas added. According to us, it is a revision, otherwise justified with the observation of Chopin's notation in this Etude, in which omissions of accidentals before the sixths' upper notes occur very frequently (e.g., in bars 5-8).

category imprint: Interpretations within context; Differences between sources

issues: EE revisions , Omissions to cancel alteration , GE revisions , Errors of A , Authentic corrections of FE