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b. 7

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

..

In the manuscripts there is no cautionary natural before g2.

category imprint: Differences between sources

issues: Cautionary accidentals

b. 7

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

..

In the sources there are sharps reminding of the already previously marked raise of these notes before the 8th and 12th semiquavers – a2 and f2. We do not consider them in the main text, as the correct text results here from both the rules on accidentals' validity and the melodic context and fingering. The sharp before a2 is included in CLI, GE2 (→GE3) and EE4. The sharp before fis present in FE (→GE1GE2GE3,→EE).

category imprint: Differences between sources

issues: Cautionary accidentals

b. 7

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

..

In Ap there is no  returning a2 at the 9th semiquaver of the bar. It must have been Chopin's oversight. 

category imprint: Differences between sources

issues: Omissions to cancel alteration , Errors of A

b. 7

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

 g2 in CLI, Ap, GE2 (→GE3) & EE4

No  in FE (→GE1, →EE2EE3) & GE4 (→GE5)

..

The lack of  raising g2 into gon the 10th semiquaver is probably an error of FE (→GE1,→EE2EE3). It is worth mentioning that when interpreted literally, FEcor has ghere, as the  before the 2nd semiquaver of the bar is still valid (see the previous remark). Similarly, despite lack of the gis featured in GE1 and GE4 (→GE5). The correctly written combination of the E minor triad on the 2nd beat of the bar and gin the described place appears only in Ap

category imprint: Differences between sources

issues: Errors in FE

b. 7

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

..

CLI has by mistake an on the 3rd beat of the bar. Probably it was similar also at the beginning of the bar, yet in this situation the copyist realised the mistake and corrected the erroneous note. 

category imprint: Interpretations within context; Differences between sources

issues: Errors of CLI