Issues : Errors in FE
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b. 8
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composition: Op. 10 No 10, Etude in A♭ major
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The version of FE1 is a result of the engraver's mistake in determining the range of the octave sign, which ends one quaver too early in this edition. Both in FE2 and in EE the error was corrected. In GE this sixth, also written with an octave sign, is actually on the correct pitch, yet the octave sign erroneously includes also the next quaver. category imprint: Differences between sources issues: EE revisions , Errors in FE , Errors in GE , Authentic corrections of FE |
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b. 8-9
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composition: Op. 10 No 10, Etude in A♭ major
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The slur of FE (→GE,EE) is obviously erroneous – the engraver led the slur to the end of the line, as it is in A. At the same time, he did not pay attention to the difference in the text's division into great staves: in A the line ends with bar 8, while in FE – with bar 9. category imprint: Differences between sources issues: EE revisions , Errors in FE , GE revisions |
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b. 16
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composition: Op. 10 No 10, Etude in A♭ major
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Both versions may be considered as justified here, both from the musical and source point of view. In the version of A Chopin avoids tripling the leading tone g1. The version of FE (→GE,EE) may be considered as accepted by Chopin, who introduced changes, among others, exactly in this bar (pedalling) while proofreading FE. The accompaniment's figure in this version has a similar scheme to the figures in the preceding bar and is identical to the figure used in bar 8. In the main text we adopt the version of the base source, i.e. FE. category imprint: Differences between sources issues: Errors in FE , Terzverschreibung error |
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b. 29-31
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composition: Op. 10 No 10, Etude in A♭ major
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In FE (→GE,EE) these bars are written with four sharp key signatures, as a result of which in each bar d notes must be provided with accidental naturals. It is probably an error of the engraver, perhaps relying on the previous section in E major (bars 17-22). Similarly in bars 32-34. category imprint: Differences between sources issues: Errors in FE , Authentic corrections of FE |
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b. 32-34
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composition: Op. 10 No 10, Etude in A♭ major
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In FE (→GE,EE) these bars – same as bars 29-31 – are written with four sharp key signatures, as a result of which in each bar d notes must be provided with accidental naturals. In FE the category imprint: Differences between sources issues: EE revisions , Errors in FE , GE revisions , Authentic corrections of FE |
3 & d2 in 
before d3 in bar 32 was omitted.