Triads
A♯ diminished chord
Tense and unstable — it usually wants to resolve up by a half step.
A♯dim is the vii° chord in B major. In minor keys: ii° in G♯ minor.
- Notes
- A♯C♯E
- Formula
- 1♭3♭5
- Built from
- root · minor 3rd · diminished 5th
How to play A♯dim
About the A♯ diminished chord
Playing it
On guitar, A♯dim has an open-position shape, x12320, using four fingers alongside the open strings. Don’t strum the low E string.
On piano, A♯dim has two black keys (A♯ and C♯) and one white key.
On ukulele the usual A♯dim shape is 3101, using three fingers.
