A# minor added 9th · Piano
A#m(add9) Chord on Piano
The A#m(add9) chord (A# minor added 9th) is built from the notes A#, C#, F and C. The keyboard diagram below shows exactly which keys to press. The same chord is also written Bbm(add9); both spellings sound identical.
Chord diagrams
Notes in this chord
- A♯
- C♯
- F
- C
Degrees: 1 – ♭3 – 5 – 9
Also written: Bbm(add9)
How to play
To play A#m(add9) on piano, press A#, C#, F and C together. In root position the lowest note is A#, and the finger numbers follow the keys left to right in the diagram.
Theory behind the chord
Minor add9 chords add the ninth to a plain minor triad without a seventh. The added tone brightens the minor colour just enough to keep it open and cinematic rather than sad. On A#m(add9) this structure sits on the root A#, so the degrees 1 – ♭3 – 5 – 9 map onto A#, C#, F and C.
Frequently asked questions
- Which notes are in the A#m(add9) chord?
- A#m(add9) contains the notes A#, C#, F and C. Relative to the root these are the degrees 1 – ♭3 – 5 – 9.
- Are A#m(add9) and Bbm(add9) the same chord?
- Yes. A#m(add9) and Bbm(add9) are enharmonically identical — the spelling differs but the frets and keys are the same. Which name is used depends on the key of the piece.
Practise A#m(add9) on your phone
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