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b. 11-12

composition: Op. 10 No 11, Etude in E♭ major

in A

in FE (→GE,EE

suggested by the editors

..

In A these bars are not written out, only marked as a repetition of bars 3-4. However, unlike in A, in FE (→GE,EE) the  mark in bar 11 was not omitted and moreover a  mark at the end of bar 12 was added. The completion of the notation could have been a result of Chopin's correction, yet it is not certain (one could imagine the engraver's error who first engraved the  marks and then added  to them, already without consulting the base text). As we cannot be dealing with the performance of both bars with one pedal here, in the main text we repeat the notation of bars 3-4

category imprint: Differences between sources; Editorial revisions

issues: Authentic corrections of FE

b. 11

composition: Op. 10 No 7, Etude in C major

..

In A Chopin overlooked the  raising c1 to con the 3rd quaver. The mistake was corrected in FE (→GE,EE). 

category imprint: Differences between sources

issues: Errors of A , Authentic corrections of FE

b. 11

composition: Op. 10 No 8, Etude in F major

Rhythmic notation in A (→FEGE,EE)

Our suggestion

..

According to us, the authentic, simplified rhythmic notation of the 1st chord may be perceived as unclear in this case. Therefore, we introduce a more exact notation with division into voices.

category imprint: Editorial revisions

issues: Different values of chord components

b. 11

composition: Op. 10 No 10, Etude in A♭ major

 in A

No sign in FE (→GE,EE)

Our variant suggestion

..

An accidental omission of the  mark in FE (→GE,EE) seems to be much more probable than Chopin's proofreading.

category imprint: Differences between sources

issues: Inaccuracies in FE

b. 11

composition: Op. 10 No 4, Etude in C♯ minor

..

Similarly as in bar 3, the original version of AI had to be also in [A], as the traces of deleting the treble and bass clefs – used for its notation – are visible in FE. Chopin introduced analogous changes also while repeating this phrases in bars 53 and 61.

category imprint: Differences between sources; Corrections & alterations

issues: Authentic corrections of FE