Issues : EE revisions

b. 65-66

composition: Op. 28 No. 15, Prelude in D♭ major

2 long accents in A

Long accent in FC (→GE)

2 short accents in FE

2 vertical accents in EE

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The two long accents we give in the main text come from A. The copyist overlooked the second one in FC (→GE), and short accents in FE result from inaccurate recreation of A. The vertical accents in EE are an arbitrary revision characteristic of this edition.

category imprint: Differences between sources

issues: EE revisions , Inaccuracies in FE , Errors of FC

b. 75

composition: Op. 28 No. 15, Prelude in D♭ major

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In the 2nd half of the bar there are no accidentals before the 2nd and 4th bottom voice quavers in A (→FC,FEEE1). It must be an oversight of Chopin, who, in his mind, changed the key to D major as the notation of g turned to a. The necessary accidentals were added in GE and EE2; in turn, the incomplete notation was not problematic for the pupils, since none of the teaching copies contains annotations here.
The  visible in FC before the last quaver was added later. 

category imprint: Interpretations within context; Differences between sources

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

b. 76

composition: Op. 28 No. 15, Prelude in D♭ major

Dotted minims in A & FE2

Minims in FC (→GE), FE1 & EE1

Minim & crotchet in EE2

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The distinct dots prolonging the d1-f1 third are overlooked in both FC (→GE) and FE1. They are restored in FE2, but omitted again in EE1, possibly by analogy with b. 80. The third added on the 4th beat in EE2 accounts for an arbitrary revision presumably aiming at complementing the supposedly missing rhythmic value, with reference to bars 1 and 20.
Similarly in b. 80.

category imprint: Differences between sources

issues: EE revisions , Inaccuracies in FE , Inaccuracies in FC

b. 78

composition: Op. 28 No. 15, Prelude in D♭ major

No extra a crotchets in A (→FCGE, →FEEE1)

Additional crotchet in EE2

2 additional crotchets suggested by the editors

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In the main text we draw additional crotchet stems next to the a notes, as was performed by Chopin in b. 3. The first one was also prolonged in EE2.

category imprint: Differences between sources; Editorial revisions

issues: EE revisions

b. 80

composition: Op. 28 No. 15, Prelude in D♭ major

Dotted minims in A

Minims in FC (→GE) & FE (→EE1)

Minim & crotchet in EE2

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Similarly to b. 76, both FC (→GE) and FE (→EE1) omitted the dots prolonging the d1-f1 third, and EE2 arbitrarily repeated it on the 4th beat.

category imprint: Differences between sources

issues: EE revisions , Inaccuracies in FE , Inaccuracies in FC