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Op. 10 No 7, Etude in C major

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b. 36

composition: Op. 10 No 7, Etude in C major

..

In A there are visible traces of adjustments of the 2nd and 3rd quavers. The removed version could have been the following: .

category imprint: Corrections & alterations

issues: Corrections in A

b. 36-37

composition: Op. 10 No 7, Etude in C major

No slur in A (→FE→GE,EE3)

Slur in EE4
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We suggest to add a slur on the basis of analogy with bars 3-4, in which Chopin added a relevant slur, while proofreading FE. The addition was already performed in EE4. 

category imprint: Editorial revisions

b. 37-39

composition: Op. 10 No 7, Etude in C major

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A (→FE→EE,GE1→GE2) has naturals before b1, the upper note of the last semiquaver in bars 38-39. The unnecessary accidentals were removed in GE3 (→GE4), yet adding a  before b1 at the end of bar 37, more justified from the formal point of view. Moreover, in the sources there is also an unnecessary  before the first c1 in bar 38. In the main text we do not include any of these signs.

category imprint: Differences between sources

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

b. 37

composition: Op. 10 No 7, Etude in C major

 in A & EE4

No sign in FE (→GE,EE3)
..

Omission of the  hairpins in FE (→GE,EE3) is certainly an error of the engraver. The sign of A appears also in two analogous places (bars 4 and 12). The hairpins in EE4 were added probably on the basis of the comparison with these bars.

category imprint: Differences between sources

issues: EE revisions , Errors in FE

b. 38

composition: Op. 10 No 7, Etude in C major

Rhythm in A, literal reading

A, possible interpretation

FE (→EE3)

GE with shifted accent

EE4 with two accents
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The rhythm of A, interpreted literally, is unclear. Aligning the notes of the L.H. under the part of the R.H. suggests that Chopin thought of an analogous version to the version of bar 34 in this place. In the main text we adopt the version of FE (→EE3), as it is the latest authentic source, while the notation therein is faultless and unequivocal. The suggested variants include also different placement and number of accents in GE and EE4, most probably or certainly non-authentic.

category imprint: Interpretations within context; Differences between sources; Corrections & alterations

issues: Errors in FE , Rhythmic errors , Errors of A , Authentic corrections of FE