Augmented seventh chord
The augmented seventh chord, or seventh augmented fifth chord, or seventh sharp five chord is a seventh chord composed of a root, major third, augmented fifth, and minor seventh (1, 3, ♯5, ♭7). It can be viewed as an augmented triad with a minor seventh. When using popular-music symbols, it is denoted by +7, aug7, or 7♯5. For example, the augmented seventh chord built on A♭, written as A♭+7, has pitches A♭-C-E-G♭:
| Component intervals from root | |
|---|---|
| minor seventh | |
| augmented fifth | |
| major third | |
| root | |
| Tuning | |
| 80:100:125:144 | |
| Forte no. / | |
| 4-24 / |
The chord can be represented by the integer notation {0, 4, 8, 10}.
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