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b.

composition: Op. 12, Variations in B♭ major

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We add a cautionary  before e1 in the main text.

category imprint:

b. 0-4

composition: WN 55, Waltz in F minor

 
 
 
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In the majority of the sources, there are two slurs within bars 1-4: the first one spanning bars 1-2, the second - bars 3-4. The beginnings and endings of the slurs were written imprecisely. AR includes one slur spanning bars 1-4. In CY, the absence of the second slur, within bars 3-4, may be considered a copying inaccuracy. Due to the repetition of the cnote at the beginning of the Waltz in AE (→CX) and CC, the first slur begins in the upbeat. A similar situation occurs in CY, however, due to the upbeat, we put the beginning of the slur in the 1st bar, contrary to the notation of the copy.

category imprint: Graphic ambiguousness; Differences between sources; Editorial revisions

b. 1

composition: Op. 29, Impromptu in A♭ major

 
 
 
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A (→GE), FE, EE1 differ in the dedication's wording - yet it concerns the same person. The A version does not precise to which of de Lobau sisters the piece was offered. We give the dedication according to the EE1, including full information concerning the dedication's addressee. In EE2 the dedication was removed.

category imprint: Differences between sources

issues: Dedications

b. 1

composition: Op. 29, Impromptu in A♭ major

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We develop Chopin's abbreviation in the tempo indication: Allo = Allegro.

category imprint: Source & stylistic information

issues: Abbreviated indications

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