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Op. 10 No 7, Etude in C major

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b. 1-5

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

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In A one can see that the penultimate semiquaver in bars 1 and 5 was initially d1-f1.

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category imprint: Corrections & alterations

issues: Corrections in A

b. 1-2

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

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In A (→FE→EE,GE1→GE2) there are naturals before the upper notes on the last semiquaver of each group (b1). The unjustified accidentals were removed in GE3 (→GE4). Cf. bars 4 and 12, as well as 37-39.

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category imprint: Differences between sources

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

b. 3

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

f1-g1 in A

f1-b1 in FE (→GE,EE)
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The  f1-g1 second in A is most probably the original version of the 3rd semiquaver. In analogous bar 36 Chopin changed it to an f1-b1 fourth already in A. The traces of corrections are also visible in bar 3, yet the  f1-a1 third was removed, probably written by mistake. In bar 11, in which the 1st phrase appears one octave higher, the f2-b2 fourth is immediately written in A. 

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category imprint: Differences between sources; Corrections & alterations

issues: Corrections in A , Authentic corrections of FE

b. 4

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

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Before the 7th semiquaver in A there is no  returning e1. However, there is a  before e1 on the 9th semiquaver, which would be unjustified, if the 7th and 8th semiquavers were meant to be e1. Therefore, an oversight of the  is beyond any doubt and it was confirmed by an accidental added in a proofreading of FE (→GE,EE). Analogous bar 37 is written correctly already in A. Cf. bar 12.

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category imprint: Interpretations within context; Differences between sources

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

b. 4-12

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

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In GE3 (→GE4) a  was added before b1 at the end of bar 4 and b2 in bar 12, which can be regarded as formally justified.

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category imprint: Differences between sources

issues: GE revisions