F♯add9

F♯add9 is the f# added 9th chord, spelled F♯ – A♯ – C♯ – G♯. a plain triad plus the ninth — colour without the seventh, clean and contemporary.

The keys
C4C5C6
F♯ – A♯ – C♯ – G♯
Practise this chord

Plug in your MIDI keyboard and let Coach Tshepho drill you on F♯add9 — it plays the chord, names any wrong notes as you play, and moves you on when you nail it.

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What's inside F♯add9
NoteInterval from rootDegree
F♯Root1
A♯Major 3rd3
C♯Perfect 5th5
G♯Major 9th9
Inversions
PositionKeys (low → high)
Root positionG♭4 – B♭4 – D♭5 – A♭5
1st inversionB♭4 – D♭5 – A♭5 – G♭5
2nd inversionD♭5 – A♭5 – G♭5 – B♭5
3rd inversionA♭5 – G♭5 – B♭5 – D♭6
A working voicing

Split the chord between two hands the way working players do — a solid shell low down, the colour tones up top:

HandKeys
Left (shell)G♭2 – D♭3
Right (colour)B♭4 – A♭5
Where F♯add9 lives

As the I chord

F♯add9 → B → D♭ → F♯add9

The classic I–IV–V–I motion with this chord as home.

In a ii–V–I

A♭m7 → D♭7 → F♯add9

The strongest cadence in harmony, resolving onto this chord.

Put F♯add9 under your fingers

Hear every voicing, see the keys light up, and drill it in the interactive Chord & Voicing Lab.

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