F# added 9th · Piano
F#add9 Chord on Piano
The F#add9 chord (F# added 9th) is built from the notes F#, A#, C# and G#. The keyboard diagram below shows exactly which keys to press. The same chord is also written Gbadd9; both spellings sound identical.
Chord diagrams
Notes in this chord
- F♯
- A♯
- C♯
- G♯
Degrees: 1 – 3 – 5 – 9
Also written: Gbadd9
How to play
To play F#add9 on piano, press F#, A#, C# and G# together. In root position the lowest note is F#, and the finger numbers follow the keys left to right in the diagram.
Theory behind the chord
Add9 chords keep the full major triad and add the ninth without a seventh. The extra note widens the chord without making it sound jazzy, which is why it is everywhere in modern acoustic pop. On F#add9 this structure sits on the root F#, so the degrees 1 – 3 – 5 – 9 map onto F#, A#, C# and G#.
Frequently asked questions
- Which notes are in the F#add9 chord?
- F#add9 contains the notes F#, A#, C# and G#. Relative to the root these are the degrees 1 – 3 – 5 – 9.
- Are F#add9 and Gbadd9 the same chord?
- Yes. F#add9 and Gbadd9 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 F#add9 on your phone
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