Issues : Errors of A

b. 8

composition: Op. 10 No 9, Etude in F minor

a in AI, GE & EE

in A (→FE)

..

The version of A (→FE) is almost certainly erroneous. It is revealed by the notation of AI in this bar and a compatible version of all sources in analogous bar 44. The correct text of GE and EE is most probably a result of revisers' actions, probably on the basis of comparison with bar 44.

category imprint: Differences between sources

issues: EE revisions , Terzverschreibung error , GE revisions , Errors of A

b. 8

composition: Op. 10 No 9, Etude in F minor

in A

in FE (→GE,EE)

..

A includes the indication rittenuto (sic!). In the main text we give ritard., which could be a result of Chopin's proofreading of FE (→GE,EE). In AI there are no indications in bars 8-9.

category imprint: Differences between sources

issues: Errors of A , Authentic corrections of FE

b. 25-27

composition: Op. 10 No 9, Etude in F minor

..

In AI Chopin would generally write accidentals only next to the upper notes of the octaves. The only sign before a bottom note is the  lowering g2 to g2 in bar 27. The notation of A is already much more precise – only the  lowering g1 to g1 in bar 25 is missing. FE (→GE,EE) have the correct text.

category imprint: Differences between sources

issues: Accidentals in different octaves , Errors of A , Authentic corrections of FE