D neapolitan major scale
The D neapolitan major scale consists of the D (Perfect unison), D# (Minor second), F (Minor third), G (Perfect fourth), A (Perfect fifth), B (Major sixth) and C# (Major seventh) notes.

How to play the D neapolitan major scale
- Find D (Root) on the piano keyboard
- Play D# (Minor second) — 1 semitone above D
- Play F (Minor third) — 3 semitones above D
- Play G (Perfect fourth) — 5 semitones above D
- Play A (Perfect fifth) — 7 semitones above D
- Play B (Major sixth) — 9 semitones above D
- Play C# (Major seventh) — 11 semitones above D
- Play all 7 notes in ascending order to perform the D neapolitan major scale