mUltimate Chopin

Op. 10 No 2, Etude in A minor

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b. 40

composition: Op. 10 No 2, Etude in A minor

..

In CLI there are no naturals returning a1 and d2. The accidentals were also originally absent in FEcor, in which Chopin added both these two naturals and a third one returning f2 on the last semiquaver in the lower voice. Eventually, both FE (→GE,EE) and Ap have the correct notation.

category imprint: Interpretations within context; Differences between sources

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

b. 40

composition: Op. 10 No 2, Etude in A minor

..

A cautionary natural before c1 in the L.H. was added in one of the last proofreadings of FE (→GE,EE). The manuscripts do not include an accidental in this place. 

category imprint: Differences between sources

issues: Cautionary accidentals , Authentic corrections of FE

b. 41

composition: Op. 10 No 2, Etude in A minor

Octave in CLI

Only A in Ap

Octave in FE (→GE,EE)
..

category imprint: Differences between sources

b. 41

composition: Op. 10 No 2, Etude in A minor

Triad & fifth in CLI

Triads in Ap & FEcor

Triads in FE (→EE2→EE3)

Triads in GE1

Triads in GE2 (→GE3→GE4→GE5) & EE4
..

The fifth on the 3rd beat of the bar in CLI is probably the original version. The sources also reflect Chopin's hesitation concerning the position of the cautionary  before c1. In the main text we adopt – following FE (→EE2→EE3) – the accidental before the chord on the 3rd beat of the bar.

category imprint: Differences between sources; Corrections & alterations

issues: EE revisions , GE revisions , Accompaniment changes , Authentic corrections of FE

b. 41

composition: Op. 10 No 2, Etude in A minor

No  in CLI

Natural in Ap & FE (→GE,EE) 
..

Lack of the  returning b2 on the penultimate semiquaver is most probably an inaccuracy of CLI's notation. Chopin may have written the accidental already in the handwritten base text for FE.

category imprint: Interpretations within context; Differences between sources

issues: Errors of CLI