Neapolitan sixth - definition of Neapolitan sixth by The Free Dictionary
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(Classical Music) (in musical harmony) a chord composed of the subdominant of the key, plus a minor third and a minor sixth. Harmonically it is equivalent to the first inversion of a major chord built upon the flattened supertonic
References in periodicals archive
In addition, diminished seventh, augmented sixth, and Neapolitan sixth
chords are all commonly used in supernatural scenes in the eighteenth century.
His admonishment against the insertion of a cadenza at the pause on the Neapolitan sixth
near the end of the fugue of the Passacaglia in C Minor is surprisingly impassioned: "no occasion for an improvised cadenza