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The version of the later sources must be a Chopinesque improvement – it is common to encounter bass notes having been lowered by an octave (or an added bottom octave) throughout the work on a piece in his output, e.g. in the Mazurka in C
Minor, Op. 50 No. 3, b. 77, 79 and analog. or in the Etude in A
Major, Op. 25 No. 1, b. 1.
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category imprint: Differences between sources; Corrections & alterations
issues: Accompaniment changes
notation: Pitch