F#
F#aug7
Notes
F# · A# · C## · E
Intervals
- RootF# (1P)
- Major 3rdA# (3M)
- Augmented 5thC## (5A)
- Minor 7thE (7m)
Fretboard
On the fretboard, D represents C##.
Adjust labels, frets, and palette in the interactive view.
About
The F♯aug7 (F♯–A♯–C♯♯–E) raises the fifth, replacing the perfect fifth with an augmented fifth. The C♯♯ adds a floating, upward-pulling quality to the dominant sound — unlike the inward pull of the ♭5, the ♯5 creates outward tension that resolves naturally when the chord moves to a tonic; here the natural target is B. The 3rd, ♭7, and ♯5 are all essential; the ♯5 is what distinguishes this from a plain F♯7. Common in jazz and blues as a voice-leading tool — the ♯5 often resolves up to the third of the tonic chord. Compared to F♯7♭5, aug7 feels more expansive and less claustrophobic.
Similar chords
Chords sharing two or more notes with this one, ranked by overlap.
Scales containing this chord
- F♯ Whole Tone (deg 1)
- A♭ Whole Tone (deg 6)
- B Harmonic Minor (V)
- B Melodic Minor (V)
- B♭ Whole Tone (deg 5)
- C Whole Tone (deg 4)
- D Whole Tone (deg 3)
- E Whole Tone (deg 2)
- G Melodic Minor (VII)
Scales whose notes include every chord tone. Roman numeral marks the chord root’s position in the scale; dashed badges aren’t linked yet.