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