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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

b. 8

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

Long accent in Ap & FEcor

 &  in FE (→GE,EE

..

In the main text, according to the entries written by Chopin himself in FEcor and Ap, we give the long accent mark over the 2nd crotchet in the L.H. In FE (→GE,EE) it was given a form of a  hairpin on the 1st beat of the bar, which totally changed its meaning. In the next proofreading Chopin brought back the stress on the E-e octave by adding  this time. According to us, it was an ad hoc intervention, forced with an erroneous interpretation of the intended by Chopin accent's mark, which is more compatible with the whole of dynamic markings of the Etude (a comparison of Ap with the final version shows that while preparing the Etude for printing, Chopin made a careful selection of the marks; he would often discard  marks, among others; cf., e.g., bar 4).  

category imprint: Differences between sources

issues: Long accents , Inaccuracies in FE

b. 8

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

..

In the manuscripts there are no cautionary naturals before the first two semiquavers in the upper voice. In FE (→GE,EE) there is a sign before e2, while in GE and EE4 was added also before f2.

category imprint: Differences between sources; Editorial revisions

issues: EE revisions , GE revisions , Cautionary accidentals

b. 8

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

..

In CLI there is no  returning don the 5th semiquaver in the upper voice. It must be a mistake.

category imprint: Interpretations within context; Differences between sources

issues: Omissions to cancel alteration , Errors of CLI