The G♭ Augmented 7th chord is a four-note chord made up of G♭, B♭, D, and F♭. It is built from a root, major third, augmented fifth, and minor seventh.
Construction
G♭ Augmented 7th = Root + Major 3rd + Minor 6th + Minor 7th = G♭ · B♭ · D · F♭
| Note | Interval | Degree |
|---|---|---|
| G♭ | Root | 1 |
| B♭ | Major 3rd | 3 |
| D | Minor 6th | ♯5 |
| F♭ | Minor 7th | ♭7 |
G♭ Augmented 7th Inversions
| Position | Notes |
|---|---|
| Root Position | G♭ – B♭ – D – F♭ |
| 1st Inversion | B♭ – D – F♭ – G♭ |
| 2nd Inversion | D – F♭ – G♭ – B♭ |
| 3rd Inversion | F♭ – G♭ – B♭ – D |
Key Signature
A Augmented 7th chord is built from symmetrical or ambiguous intervals, so it doesn’t belong to a single key and has no key signature of its own.
Same Notes, Other Names
The notes G♭ – B♭ – D – F♭ aren’t exclusive to this chord. Depending on which note is the bass and how the chord functions, the same pitches also spell:
G♭ Augmented 7th — Frequently Asked Questions
What is the G♭ Augmented 7th chord on piano?
The G♭ Augmented 7th chord contains the notes G♭ – B♭ – D – F♭. On piano, play these notes together to sound the chord.
What notes are in the Gb Augmented 7th chord?
The Gb Augmented 7th chord (Gb+7) contains four notes: Gb (root), Bb (major third), D (augmented fifth), and Fb (minor seventh, enharmonically E). It combines an augmented triad with a minor seventh.
How does Gb Augmented 7th differ from Gb Dominant 7th?
Both contain Gb, Bb, and Fb. Gb+7 has D (augmented fifth) while Gb7 has Db (perfect fifth). The raised fifth adds extra tension.
How is Gb Augmented 7th used in music?
Gb+7 is an altered dominant resolving to Cb/B Major. The D pulls up to Eb while Fb pulls down to Eb — converging voice leading. In practice, the enharmonic F#+7 is more commonly used.
What genres use Augmented 7th chords?
Augmented 7th chords are common in jazz, gospel, blues, and R&B for adding emotional intensity to dominant resolutions.
What songs use Augmented 7th chords?
Augmented 7th chords appear in jazz standards and gospel. Whether spelled Gb+7 or F#+7, the sound is identical.
What is the difference between +7 and 7#5?
They are the same chord. Gb+7, Gb7#5, and Gbaug7 all refer to Gb Augmented 7th.