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

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