mUltimate Chopin

Op. 10 No 12, Etude in C minor

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b. 30-32

composition: Op. 10 No 12, Etude in C minor

Demisemiquavers in A

Semiquavers in FE (→GE,EE) 
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Double dotted rhythm (with a demisemiquaver) at the end of bars 30 and 32 in A was changed by Chopin during a proofreading of FE (→GE,EE). The change has an undeniable impact on the expressive character of these motifs, however, it also cannot be excluded that it is related to the acceleration of the Etude's tempo, which was also introduced in a proofreading of FE. Cf. bar 27.
In FE bar 32 includes an erroneous rhythm, as the e1-e2 quaver is extended with two dots, despite the fact that the next octave is a semiquaver. It may be a result of an inaccurately performed proofreading.

category imprint: Differences between sources; Corrections & alterations

issues: Authentic corrections of FE

b. 30

composition: Op. 10 No 12, Etude in C minor

Slurs in A (→FE→GE,EE) 

Our suggestion
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In the sources the slur abruptly ends after the 1st beat of the bar. It is an inadvertently left element of the original slurring. In the following part of the bar, as well as in bar 32, there are visible traces of extending and combining the slurs in A.

category imprint: Interpretations within context; Editorial revisions

b. 30

composition: Op. 10 No 12, Etude in C minor

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In A (→FE→EE) there are no flats before the 8th and 16th notes in the L.H. This patent inaccuracy was corrected in GE.

category imprint: Differences between sources

issues: Accidentals in different octaves , Omission of current key accidentals

b. 31

composition: Op. 10 No 12, Etude in C minor

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In A (→FE) there is no  before the 2nd note on the 3rd beat in the bar (f) nor a  before the 2nd note on the 4th beat (a), which was corrected in GE. In EE the missing accidentals were gradually added:  in EE3,  in EE4.

In GE1 the  before the 1st note in the L.H. (F1) was omitted.  

category imprint: Interpretations within context; Differences between sources

issues: EE revisions , Accidentals in different octaves , Errors in GE , GE revisions

b. 31

composition: Op. 10 No 12, Etude in C minor

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A has an unnecessary  before c2 before the chord on the 4th beat in the bar, yet it does not have the necessary  raising f1 to f1. In FE the chord was left without any accidental, which was corrected in EE3. The additions were also performed in GE1 (→GE2), in which the accidentals are placed before each note. In GE3 (→GE4) three upper accidentals were removed, therefore, also the necessary  before f1. An unnecessary revision was also performed in EE4, adding a  before c2. 

category imprint: Interpretations within context; Differences between sources

issues: EE revisions , Errors in FE , Accidentals in different octaves , Errors in GE , GE revisions , Cautionary accidentals