The Neapolitan Scales are scales that are
| Minor | Major* |
|---|---|
| H | H |
| W | W |
| W | W |
| W | W |
| H | W |
| W | W |
| H | H |
*The major is almost the same as the Harmonic Major Scale
So that's the basics. It can be considered a major scale with the sixth degree lowered, Ionian ♭6 or the harmonic minor scale with the third degree raised. The intervals between the notes of a harmonic major scale follow the sequence below; whole, whole, half, whole, half, augmented second, half.
The modes are
Minor
| Mode | Name of scale | Degrees | Notes (on C Neap. Minor) | Triad Chords | Seventh Chords | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Neapolitan Minor | 1 | ♭2 | ♭3 | 4 | 5 | ♭6 | 7 | 8 | C | D♭ | E♭ | F | G | A♭ | B | C | Cm | Cmmaj7 |
| 2 | Lydian ♯6 | 1 | 2 | 3 | ♯4 | 5 | ♯6 | 7 | 8 | D♭ | E♭ | F | G | A♭ | B | C | D♭ | D♭ | D♭maj7 or D♭♯6 (equivalent to D♭7) |
| 3 | Mixolydian Augmented | 1 | 2 | 3 | 4 | ♯5 | 6 | ♭7 | 8 | E♭ | F | G | A♭ | B | C | D♭ | E♭ | E♭+ | E♭+7 |
| 4 | Romani Minor
(or Aeolian/Natural Minor ♯4) |
1 | 2 | ♭3 | ♯4 | 5 | ♭6 | ♭7 | 8 | F | G | A♭ | B | C | D♭ | E♭ | F | Fm | Fm7 |
| 5 | Locrian Dominant | 1 | ♭2 | 3 | 4 | ♭5 | ♭6 | ♭7 | 8 | G | A♭ | B | C | D♭ | E♭ | F | G | G♭5 | G7♭5 |
| 6 | Ionian/Major ♯2 | 1 | ♯2 | 3 | 4 | 5 | 6 | 7 | 8 | A♭ | B | C | D♭ | E♭ | F | G | A♭ | A♭ or A♭m | A♭maj7 or A♭mmaj7 |
| 7 | Ultralocrian/Altered Diminished 3 | 1 | ♭2 | 3 | ♭4 | ♭5 | ♭6 | 7 | 8 | B | C | D♭ | E♭ | F | G | A♭ | B | *B♭5 | **B 6♭5 |
And Major
| Mode | Name of scale | Degrees | Notes (on C Neap. Minor) | Triad Chords | Seventh Chords | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Neapolitan Minor | 1 | ♭2 | ♭3 | 4 | 5 | ♭6 | 7 | 8 | C | D♭ | E♭ | F | G | A♭ | B | C | Cm | Cmmaj7 |
| 2 | Lydian ♯6 | 1 | 2 | 3 | ♯4 | 5 | ♯6 | 7 | 8 | D♭ | E♭ | F | G | A♭ | B | C | D♭ | D♭ | D♭maj7 or D♭♯6 (equivalent to D♭7) |
| 3 | Mixolydian Augmented | 1 | 2 | 3 | 4 | ♯5 | 6 | ♭7 | 8 | E♭ | F | G | A♭ | B | C | D♭ | E♭ | E♭+ | E♭+7 |
| 4 | Romani Minor
(or Aeolian/Natural Minor ♯4) |
1 | 2 | ♭3 | ♯4 | 5 | ♭6 | ♭7 | 8 | F | G | A♭ | B | C | D♭ | E♭ | F | Fm | Fm7 |
| 5 | Locrian Dominant | 1 | ♭2 | 3 | 4 | ♭5 | ♭6 | ♭7 | 8 | G | A♭ | B | C | D♭ | E♭ | F | G | G♭5 | G7♭5 |
| 6 | Ionian/Major ♯2 | 1 | ♯2 | 3 | 4 | 5 | 6 | 7 | 8 | A♭ | B | C | D♭ | E♭ | F | G | A♭ | A♭ or A♭m | A♭maj7 or A♭mmaj7 |
| 7 | Ultralocrian/Altered Diminished 3 | 1 | ♭2 | 3 | ♭4 | ♭5 | ♭6 | 7 | 8 | B | C | D♭ | E♭ | F | G | A♭ | B | *B♭5 | **B 6♭5 |