F♯add9
F♯add9
Notes
F♯ · A♯ · C♯ · G♯
Intervals
- RootF♯ (1P)
- Major 3rdA♯ (3M)
- Perfect 5thC♯ (5P)
- Major 9thG♯ (9M)
Fretboard
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About
The F♯add9 (F♯–A♯–C♯–G♯) adds a ninth to a major triad without including a 7th. The distinction matters: because there is no 7th, the chord stays harmonically stable and resolved rather than suggesting dominant or subdominant motion. The G♯ adds brightness and shimmer; the A♯ retains the major identity. On guitar, open-string voicings make add9 sounds particularly resonant. The 5th can be omitted without loss; the 3rd and 9th are both essential. Compared to F♯Maj9, add9 is simpler and more grounded — a major triad with a single added color. Compared to plain F♯, the 9th adds a touch of modern shimmer.
Similar chords
Chords sharing two or more notes with this one, ranked by overlap.
Scales containing this chord
- F♯ Lydian (I)
- F♯ Major (I)
- F♯ Major Pentatonic (deg 1)
- F♯ Mixolydian (I)
- A♭ Dorian (VII)
- A♭ Mixolydian (VII)
- A♭ Natural Minor (VII)
- B Lydian (V)
- B Major (V)
- B Melodic Minor (V)
- B♭ Locrian (VI)
- B♭ Natural Minor (VI)
- B♭ Phrygian (VI)
- C Locrian (V)
- D♭ Dorian (IV)
- D♭ Major (IV)
- D♭ Melodic Minor (IV)
- D♭ Mixolydian (IV)
- E Lydian (II)
- E♭ Blues (deg 2)
- E♭ Dorian (III)
- E♭ Minor Pentatonic (deg 2)
- E♭ Natural Minor (III)
- E♭ Phrygian (III)
- F Locrian (II)
- F Phrygian (II)
Scales whose notes include every chord tone. The Roman numeral (or scale degree) marks the chord root’s position in the scale.