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b. 14

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

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In AI the part of the L.H. in this bar is marked in this bar as repetition of bar 13.

category imprint: Source & stylistic information

b. 21-26

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

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It is hard to determine whether it was Chopin that introduced the change of key marking – in [A] or proofreading FE – or it was a result of the engraver's error. The error is justified with flats before g in bar 24 and g1 in bar 25, apparently added in FE just in print. The notation with five flats is more justified from the point of view of the harmonic flow – the key that dominates from bar 22 to the beginning of bar 25 is B minor. In spite of this, in the main text we give the notation of FE (→GE,EE), as Chopin did not take the opportunity to correct it in a proofreading of FE. Cf. the Etude in A major, No. 10, bars 29-31.

category imprint: Differences between sources; Corrections & alterations

issues: Authentic corrections of FE

b. 34

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

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In AI only the first group of semiquavers is written out. The remaining ones are marked only as its repetition.

category imprint: Source & stylistic information

issues: Abbreviated notation of A

b. 37-38

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

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In AI the last group of semiquavers in bar 37 and last three in bar 38 are not written out with notes and only marked as repetition of the previous ones.

category imprint: Source & stylistic information

issues: Abbreviated notation of A

b. 49

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

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In AI this bar is briefly marked as repetition of the previous one, while in the part of the R.H. there is a last, different group of semiquavers.

category imprint: Differences between sources

issues: Abbreviated notation of A