A# major · Piano
A# Chord on Piano
The A# chord (A# major) is built from the notes A#, D and F. The keyboard diagram below shows exactly which keys to press. The same chord is also written Bb; both spellings sound identical.
Chord diagrams
Notes in this chord
- A♯
- D
- F
Degrees: 1 – 3 – 5
Also written: Bb
How to play
To play A# on piano, press A#, D and F 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
Major chords sound bright and settled. They are built from a root, a major third and a perfect fifth, and they carry most of the resolution points in pop, rock and folk. On A# this structure sits on the root A#, so the degrees 1 – 3 – 5 map onto A#, D and F. A# is the I chord in the key of A# major, the V chord in F major and the IV chord in D# major. Its relative minor is Gm, which shares the same set of notes. The most common progression it appears in is A# – Gm – D# – F.
Frequently asked questions
- Which notes are in the A# chord?
- A# contains the notes A#, D and F. Relative to the root these are the degrees 1 – 3 – 5.
- Are A# and Bb the same chord?
- Yes. A# and Bb 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.
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