F♯ Add 9
Also known as G♭ Add 9
Same keys, different spelling.
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Listen plays the chord. Play Along lights up each note in order so you can follow.
F♯add9
F♯ – A♯ – C♯ – G♯
Formula:R-M3-P5-M9
Intervals:P1-M3-P5-M9
Scale Degrees:1-3-5-9
Introduction
The F♯ Add 9 chord is a four-note chord made up of F♯, A♯, C♯, and G♯. It is built from a root, major third, perfect fifth, and major ninth.
Notes
F♯ Add 9 Inversions
| Position | Notes |
|---|---|
| Root Position | F♯ – A♯ – C♯ – G♯ |
| 1st Inversion | A♯ – C♯ – F♯ – G♯ |
| 2nd Inversion | C♯ – F♯ – G♯ – A♯ |
| 3rd Inversion | F♯ – A♯ – C♯ – G♯ |
Key Signature
The key of F# Add 9 has 6 sharps.
F♯C♯G♯D♯A♯E♯
Order of sharps
Sharps are added to a key signature in a fixed order. Each new sharp key adds the next sharp on the list.
F♯C♯G♯D♯A♯E♯B♯
Mnemonic: Father Charles Goes Down And Ends Battle
Chords in the Key of F♯ Major
These are the diatonic triads built on each degree of the F♯ major scale:
C
D
E
F
G
A
B
C
D
E
F
G
A
B
I — F♯ Major (major)
Theory: Intervals
Formula: R-M3-P5-M9
Intervals: P1-M3-P5-M9
The F♯ Add 9 is built by stacking intervals from the root note. The formula R-M3-P5-M9 describes the scale degrees used. The intervals P1-M3-P5-M9 show the distance between each note in the chord.
F♯ Add 9 — Frequently Asked Questions
What notes are in the F# Add 9 chord?
F# Add 9 is built from the F# root. Check the interactive keyboard above for exact notes and fingering.
How is the F# Add 9 chord used in music?
F# Add 9 appears in jazz, pop, and classical contexts. Its sound depends on the chord quality (Add 9).
What is the fingering for F# Add 9?
See the fingering chart above. Right hand typically uses thumb on root. Left hand uses pinky on root.
What are the inversions of F# Add 9?
Use the inversion buttons above to see each inversion with notes, fingering, and staff notation.
Practice Tips
- Major triad plus the 9th — no 7th.
- Open, modern pop sound.
- Simpler than a full 9th chord.
- Compare with F#9.
- Common in pop and worship music.
- Bright, spacious quality.
Related Tools
Chord FinderLook up any chord — see the notes, hear it, and play along.Chord DrillTimed drills to build speed and recognition across all chord types.Practice RoomPlug in a MIDI keyboard and get real-time feedback on every chord and scale.Circle of FifthsVisualize key relationships, relative minors, and key signatures.MIDI MonitorLive MIDI message stream with note names, velocity, and a scrolling staff.