JC
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The natural raising b
2 into b2 is featured only in JC (cf. the note on other naturals in this bar). It is certainly a result of using different convention regulating the rules of validity of the accidentals taking into consideration the octave sign.
Compare the passage in the sources »
category imprint: Interpretations within context; Differences between sources
issues: Accidentals in different octaves
notation: Pitch