Topic summary
Neapolitan sixth
Extracted from the Wikipedia article Neapolitan chord.
In European Classical music, the Neapolitan most commonly occurs in first inversion so that it is notated either as ♭II or N and normally referred to as a Neapolitan sixth chord. In B major or B minor, for example, a Neapolitan sixth chord in first inversion contains an interval of a minor sixth between E and C.