The comparison of bars 150-153 with the preceding four-bar section (bars 146-149) shows that if it were not for the problematic g2(1) notes at the beginning of bar 150, they would be practically identical, harmonically speaking. This suggests that the lowering g2 to g2 was misplaced – it was put before the 7th quaver, yet it should have been put before the 5th quaver. What is more, adopting g2(1) to the discussed place would result in the following sequence of chords: E – E7 minor – A minor, which is unnatural in the context of the undisturbed key of E minor in the preceding 4 bars. Therefore, how could such a serious mistake happen? Note that Chopin probably added some accidentals in this fragment after having written the notes – one can tell it because of the lack of space for them – and it is likely that he was doing it backwards, from the end of the page (in bar 152). In this scenario, adding a to the first g2 note he encountered in bar 150 is totally understandable. According to us, we cannot rule out another scenario, in which the composer wrote a flat on the 7th quaver, considering it a cautionary accidental. For while the key of E minor on the 5th quaver could have been obvious to him, g2 on the 7th quaver would be completely natural as a note of a dominant seventh chord resolving to the key of A minor in the next bar, and could have prompted Chopin to write a (the Sonata abounds in figurations based on simple, regular progressions, both diatonic and using altered leading tones).
Chopin also wrote flats lowering g to g disregarding the first g note in bar 152, although in that case it was a patent mistake.
category imprint: Editorial revisions
issues: Omission of current key accidentals, Errors of A
notation: Pitch
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