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Op. 10 No 5, Etude in G♭ major

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Issues : Last key signature sign

b. 9

composition: Op. 10 No 5, Etude in G♭ major

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We add a cautionary  before d1; it was already performed in GE and EE4. We remove the unjustified  before c1 in the 2nd chord; the change was already introduced in GE and EE4.

category imprint: Differences between sources

issues: GE revisions , Cautionary accidentals , Last key signature sign

b. 17-18

composition: Op. 10 No 5, Etude in G♭ major

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The missing naturals raising c1 to c1 in A are a patent error by Chopin.

category imprint: Interpretations within context; Differences between sources

issues: Omission of current key accidentals , Errors of A , Authentic corrections of FE , Last key signature sign