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Op. 29, Impromptu in A♭ major

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Rhythm

b. 1

composition: Op. 29, Impromptu in A♭ major

 
 
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The  time signature is most probably an error or FE's and GE's revision. Changes of time signature indication of that kind are to be found on a number of occasions also in other Chopin's pieces issued by those publishing houses – cf. e.g. Etude in C, Op. 10 No. 1, bar 1..

category imprint: Differences between sources

issues: Changes of metre , Inaccuracies in GE , Inaccuracies in FE , 4/4 or 2/2

b. 1-2

composition: Op. 29, Impromptu in A♭ major

A, FE, EE
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In GE a change in the tie layout in all analogous places was performed (bars 4-5, 19-21, 83-84, 87-88 and 101-103). A's notation in bars 2, 16, 84, 88 and 101-103 proves that the graphic layout with one quaver tie was developed by Chopin.

category imprint: Differences between sources

issues: GE revisions

b. 5-6

composition: Op. 29, Impromptu in A♭ major

 
 
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GE introduced arbitrary changes into quaver ties.

category imprint: Differences between sources

issues: GE revisions

b. 11-12

composition: Op. 29, Impromptu in A♭ major

 
 
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EE1 is lacking the tie holding b2. The error is evidenced by both the correction in EE2 and the phrasing slur over that fragment. The same applies to analogous bars 93-94.

category imprint: Differences between sources

issues: Errors in EE

b. 12

composition: Op. 29, Impromptu in A♭ major

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EE and FE omitted the stem extending e on the 4th crotchet of the bar.

category imprint: Differences between sources

issues: Errors in FE , Errors in EE