What are the diatonic chords of D Neapolitan Major?

The diatonic chords of D Neapolitan Major are built by harmonizing each degree of the scale in thirds. The scale degrees are 1 ♭2 ♭3 4 5 6 7 and the intervals are H-W-W-W-W-W-H. The triads are: D minor, Eb augmented, F augmented, G major, A (1-3-♭5), B diminished, C# (1-2-♭5).

What is scale harmonization?

Scale harmonization is the process of building chords from each degree of a scale by stacking thirds. Each note of the scale becomes the root of a chord, producing a set of diatonic chords (triads and seventh chords) that naturally belong to that key.

What is Practice Mode in the Scale Harmonizer?

Practice Mode is an interactive study tool that cycles through all diatonic chords with a synchronized fretboard visualization (switch between scale and arpeggio view), adjustable tempo (40–240 BPM), and audio playback. It includes ii-V-I progressions and secondary dominant exercises — the fretboard automatically shows the contextually correct scale for each chord (e.g., Dorian for the ii, Mixolydian for the V7).

D neapolitan major chords

All tres cubano chords for the D neapolitan major scale

Show scale diagram ↓

Chord Voicings

Harmony

Originalii–V–ISec. Dom.

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FingerNoteDegree

Fretboard

ScaleArpeggio

D neapolitan major scale diatonic chords

ID minor

IIE♭ aug

IIIF aug

IVG major

VA (1-3-♭5)

VIB dim

VIIC♯ (1-2-♭5)

D neapolitan major scale seventh chords

ID mmaj7

IIE♭ major seventh flat sixth

IIIF (1-3-♭6-♭7)

IVG 7

VA (1-3-♭5-♭7)

VIB m7♭5

VIIC♯ (1-2-♭5-♭7)

D neapolitan major — Tres Cubano scale

Tres Cubano fretboard diagram

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D neapolitan major scale — chords and intervals

Diatonic chords: D minor, Eb augmented, F augmented, G major, A (1-3-♭5), B diminished, C# (1-2-♭5).

Intervals: H-W-W-W-W-W-H.

Use the interactive harmonizer above to explore triads, seventh chords, and chord voicings for composing with the D neapolitan major scale on Tres Cubano.