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b. 28
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composition: Op. 28 No. 21, Prelude in B♭ major
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In the notation of A (→FC), reproduced by us in the main text, in which g category imprint: Differences between sources issues: EE revisions , Errors in FE |
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b. 31
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composition: Op. 28 No. 21, Prelude in B♭ major
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In A (→FE,FC→GE1) there is no category imprint: Interpretations within context; Differences between sources issues: EE revisions , Errors in EE , GE revisions , Omission of current key accidentals , Errors of A , Errors repeated in FE |
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b. 31
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composition: Op. 28 No. 21, Prelude in B♭ major
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In A Chopin crossed out the category imprint: Corrections & alterations; Source & stylistic information issues: Corrections in A , Cautionary accidentals , Deletions in A |
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b. 33-36
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composition: Op. 28 No. 21, Prelude in B♭ major
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In the main text we give a contextual interpretation of the slurring of A – we consider the bottom slur in b. 33, which closes the line, to be inaccurate, since it is too short (like in a few other places, see b. 1). The clearly extended slurs in subsequent analogous bars undoubtedly reveal Chopin's intention. However, this notation was not reproduced correctly in any of the sources, which may be explained by revision (in all cases), an erroneous interpretation (FC) or carelessness (GE). category imprint: Graphic ambiguousness issues: Errors in FE , Inaccurate slurs in A , Errors in GE , FE revisions , Inaccuracies in FC , Uncertain slur continuation |
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b. 33-35
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composition: Op. 28 No. 21, Prelude in B♭ major
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There is nothing to suggest the authenticity of the fingering added in EE in bars 33 and 35. category imprint: Differences between sources issues: EE revisions |
1 on the 5th quaver is on the top stave, this note does not require an accidental. In the editions it was moved to the bottom stave, yet it was only 
lowering a2 to a
