D half diminished scale
The D half diminished scale consists of the D (Perfect unison), E (Major second), F (Minor third), G (Perfect fourth), G# (Diminished fifth), A# (Minor sixth) and C (Minor seventh) notes.

How to play the D half diminished scale
- Find D (Root) on the piano keyboard
- Play E (Major second) — 2 semitones above D
- Play F (Minor third) — 3 semitones above D
- Play G (Perfect fourth) — 5 semitones above D
- Play G# (Diminished fifth) — 6 semitones above D
- Play A# (Minor sixth) — 8 semitones above D
- Play C (Minor seventh) — 10 semitones above D
- Play all 7 notes in ascending order to perform the D half diminished scale