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Op. 24 No. 4, Mazurka in B♭ minor

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Rhythm

b. 25-27

composition: Op. 24 No. 4, Mazurka in B♭ minor

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In bars 25-28 A initially had the rhythm . Later, Chopin was adding dots and beams, yet inaccurately, omitting the 2nd dot on the 2nd beat of bar 25 and on the 2nd and 3rd beats of bar 27. Those errors were corrected in GE (→FE→EE).

category imprint: Differences between sources

issues: Errors resulting from corrections , Rhythmic errors , Errors of A

b. 28

composition: Op. 24 No. 4, Mazurka in B♭ minor

The rhythm of A (interpretation)

GE1 (erroneous rhythm)

FE (→EE)
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Determining Chopin's intention related to the rhythm on the 3rd beat of the bar seems impossible here. A erroneously has a quaver and two demisemiquavers () in the upper voice. The text of GE1 is also erroneous : . That latter rhythms was corrected both in GE2 (→GE3) and in FE (→EE). The version of GE2, although it is the work of the reviewer, may be considered an alternative to our interpretation of the rhythm of A. The version of FE may result from Chopin's correction, yet this is not certain. 

category imprint: Interpretations within context; Differences between sources

issues: Errors resulting from corrections , GE revisions , Rhythmic errors , Authentic corrections of FE

b. 29

composition: Op. 24 No. 4, Mazurka in B♭ minor

One-part notation in  A

Additional crotchets in GE (→FE→EE)
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The way in which both c1 notes were written in A was the reason why in GE (→FE→EE) they were interpreted as having additional downward crotchet stems. Moreover, at the beginning of the bar each of the notes of the seventh c1-b flat2 was written as belonging to a different voice. 

category imprint: Graphic ambiguousness; Differences between sources

issues: Uncertain notes on ledger lines

b. 31

composition: Op. 24 No. 4, Mazurka in B♭ minor

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In A, the quaver c1 in this bar does not differ much from those from bars 23 and 29, yet the editions do not have an extra crotchet stem added here (except GE3). 

category imprint: Differences between sources; Source & stylistic information

issues: GE revisions , Uncertain notes on ledger lines

b. 32

composition: Op. 24 No. 4, Mazurka in B♭ minor

A synchronization mark in FED

No visual hint provided
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category imprint: Differences between sources

issues: Annotations in teaching copies , Annotations in FED , Synchronization markings