A# dominant 7th · Piano
A#7 Chord on Piano
The A#7 chord (A# dominant 7th) is built from the notes A#, D, F and G#. The keyboard diagram below shows exactly which keys to press. The same chord is also written Bb7; both spellings sound identical.
Chord diagrams
Notes in this chord
- A♯
- D
- F
- G♯
Degrees: 1 – 3 – 5 – ♭7
Also written: Bb7
How to play
To play A#7 on piano, press A#, D, F and G# 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
Dominant seventh chords add a minor seventh on top of a major triad. The tension between the third and the seventh is what makes them pull towards the chord a fourth above — the engine of blues and jazz turnarounds. On A#7 this structure sits on the root A#, so the degrees 1 – 3 – 5 – ♭7 map onto A#, D, F and G#.
Frequently asked questions
- Which notes are in the A#7 chord?
- A#7 contains the notes A#, D, F and G#. Relative to the root these are the degrees 1 – 3 – 5 – ♭7.
- Are A#7 and Bb7 the same chord?
- Yes. A#7 and Bb7 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#7 on your phone
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