Issues : Errors in EE
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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. 38
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composition: Op. 28 No. 21, Prelude in B♭ major
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The omission of the accent is undoubtedly an oversight by the engraver of EE. category imprint: Differences between sources issues: Errors in EE |
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b. 38-39
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composition: Op. 28 No. 21, Prelude in B♭ major
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Bar 38 ends the line in A. Both the R.H. and L.H. slurs that begin in that bar clearly indicate that they should be continued. However, there is no trace of continuation of those slurs in b. 39; what is more, in the R.H. part the bar begins with a rest, which proves that the notation of A in b. 38 is inaccurate. Due to the above reason, in the main text we suggest an interpretation according to which the L.H. slur also encompasses only the 5 last quavers in that bar. Nevertheless, we can regard the interpretation of FC (→GE) and FE as equal. category imprint: Graphic ambiguousness; Differences between sources; Source & stylistic information issues: Errors in EE , Inaccurate slurs in A , Uncertain slur continuation |
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b. 39
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composition: Op. 28 No. 21, Prelude in B♭ major
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In A the staccato mark under the 1st quaver is in the form of a wedge, and this is how we give it in the main text. In FC (→GE) Fontana must have assumed that the top part of the mark was an unintentional trace of a pen, which cannot be ruled out completely, although such defects in the notation of dots are very rare in Chopin's autographs – cf., e.g. dots in the Prelude in G category imprint: Graphic ambiguousness; Differences between sources issues: Errors in EE , Wedges |
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b. 43
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composition: Op. 28 No. 21, Prelude in B♭ major category imprint: Differences between sources issues: Errors in EE |
lowering a2 to a
2. The accidental was added in 
Minor No. 12: out of 79 staccato marks, 77 are dots (only R.H. marks in b. 65 and 73 should rather be regarded as wedges), among which only two in b. 9 are not round or punctual.