Augmented Seventh Chord
The augmented seventh chord adds a minor seventh to the augmented triad, combining the restlessness of an augmented fifth with the tension of a dominant seventh. Used for maximum harmonic tension.
Symbol: aug7, +7, 7♯5
Formula: 1-3-♯5-♭7
C Augmented Seventh Chord: C – E – G# – A#
Choose a Root
C Augmented Seventh Chord G Augmented Seventh Chord D Augmented Seventh Chord A Augmented Seventh Chord E Augmented Seventh Chord B Augmented Seventh Chord F# Augmented Seventh Chord F Augmented Seventh Chord Bb Augmented Seventh Chord Eb Augmented Seventh Chord Ab Augmented Seventh Chord Db Augmented Seventh Chord
Interval Formula
| Degree | Interval | Semitones from Root | Note (C Augmented Seventh Chord) |
|---|---|---|---|
| 1 | Root (1) | 0 | C |
| 3 | Major 3rd (3) | 4 | E |
| ♯5 | Augmented 5th (♯5) | 8 | G# |
| ♭7 | Minor 7th (♭7) | 10 | A# |
Related Chords
Common Progressions
- V+7-I
- I+7-IV