mUltimate Chopin

Op. 10 No 1, Etude in C major

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b. 60

composition: Op. 10 No 1, Etude in C major

e2 in CLI

e2 in FE (→GE,EE) 
..

According to us, e2 in CLI is rather the original version of this place than a simple oversight of a . It is proved by other more schematic versions in CLI, as, e.g., in bar 64, in which a mechanical error seems to be unlikely. 

category imprint: Differences between sources

issues: Main-line changes

b. 64

composition: Op. 10 No 1, Etude in C major

F in CLI

Octave in FE (→GE,EE)
..

Lack of the lower octave in CLI may be a consequence of an oversight, however, due to a different version of the subsequent bar, it is not entirely sure. In FE the octave is written in an abbreviated form.

category imprint: Differences between sources

issues: Abbreviated octaves' notation , Errors of CLI

b. 64

composition: Op. 10 No 1, Etude in C major

E-C in CLI

D-B in FE (→GE,EE) 
..

The version of FE (→GE,EE) adopted in the main text includes undeniable harmonic improvements in comparison with the original text of CLI. Similarly to bars 5 and 60, the incentive to introduce the changes could stem from the willingness to avoid parallel fifths in combination with the next chord.

category imprint: Differences between sources

issues: Main-line changes

b. 65-66

composition: Op. 10 No 1, Etude in C major

E-e in CLI

E1-E in FE (→GE) & EE3 (→EE4) 

E1-E in EE2
..

The version of CLI is definitely original. In the main text we give the more subtle version of FE (→GE,EE; in EE2 without the tie sustaining E).

category imprint: Differences between sources; Source & stylistic information

issues: Errors in EE , Accompaniment changes , Bass register changes , Abbreviated octaves' notation

b. 66

composition: Op. 10 No 1, Etude in C major

..

CLI has undoubtedly the erroneous c1 as the 12th semiquaver.

category imprint: Interpretations within context; Differences between sources

issues: Errors of CLI