# G♯ Augmented 7th piano chord (G♯aug7)

G♯aug7 contains G♯, B♯, D× and F♯. An augmented triad with the minor seventh added on top. G♯ and F♯ are black keys; B♯ and D× are white.

- Canonical page: https://piano.org/chords/augmented-7th/g-sharp/
- Entity: chord:augmented-7th:g-sharp
- Notes: G♯ B♯ D× F♯
- Formula: 1 3 ♯5 ♭7
- Intervals from root: P1, M3, m6, m7
- Interval stack (semitones): 4 4 2
- Also written: G♯aug7, G#aug7, G♯ augmented 7th
- Parameters: A440, 12-TET, 165 mm octave, spans centre to centre

## Construction

| Degree | Note | Interval from root | Semitones |
| --- | --- | --- | --- |
| 1 | G♯ | Perfect unison | 0 |
| 3 | B♯ | Major third | 4 |
| ♯5 | D× | Minor sixth | 8 |
| ♭7 | F♯ | Minor seventh | 10 |

## Fingering

Rest your right hand over the notes with finger 2 on G♯, finger 3 on B♯, finger 4 on D×, finger 5 on F♯. The left hand mirrors it.
Right hand 2-3-4-5, left hand 5-4-3-2. Source: piano.org fingering method v1.

## Inversions

| Position | Bass | Notes in order | Figured bass | Span |
| --- | --- | --- | --- | --- |
| Root position | G♯ | G♯3 B♯4 D×4 F♯4 | 7 | 10 st, 138 mm |
| First inversion (G♯aug7/B♯) | B♯ | B♯4 D×4 F♯4 G♯4 | 6/5 | 8 st, 110 mm |
| Second inversion (G♯aug7/D×) | D× | D×4 F♯4 G♯4 B♯5 | 4/3 | 8 st, 110 mm |
| Third inversion (G♯aug7/F♯) | F♯ | F♯4 G♯4 B♯5 D×5 | 4/2 | 10 st, 138 mm |

## Voicings (10)

| Voicing | Notes | Span | Relation | Omits or adds |
| --- | --- | --- | --- | --- |
| Close, root position | G♯3 B♯4 D×4 F♯4 | 10 st, 138 mm | identical | none |
| Close, first inversion | B♯4 D×4 F♯4 G♯4 | 8 st, 110 mm | identical | none |
| Close, second inversion | D×4 F♯4 G♯4 B♯5 | 8 st, 110 mm | identical | none |
| Close, third inversion | F♯4 G♯4 B♯5 D×5 | 10 st, 138 mm | identical | none |
| Drop 2 | D×3 G♯3 B♯4 F♯4 | 14 st, 193 mm | identical | none |
| Drop 3 | B♯3 G♯3 D×4 F♯4 | 18 st, 248 mm | identical | none |
| Drop 2 and 4 | G♯2 D×3 B♯4 F♯4 | 22 st, 303 mm | identical | none |
| Shell, root ♭7 3 | G♯2 F♯3 B♯4 | 16 st, 220 mm | subset | omits D× |
| Guide tones, 3 and ♭7 | B♯4 F♯4 | 6 st, 83 mm | subset | omits G♯ and D× |
| Rootless close | B♯4 D×4 F♯4 | 6 st, 83 mm | subset | omits G♯ |

## One-edit neighbors

| Becomes | Edit | Changes | Common tones |
| --- | --- | --- | --- |
| G♯aug | 1 3 ♯5 | drops F♯ | 3 |
| G♯7 | 1 3 5 ♭7 | D× becomes D♯ | 3 |
| G♯9 | 1 3 5 ♭7 9 | D× becomes D♯, A♯ | 3 |
| G♯ | 1 3 5 | D×, F♯ becomes D♯ | 2 |
| G♯maj7 | 1 3 5 7 | D×, F♯ becomes D♯, F× | 2 |
| G♯m7 | 1 ♭3 5 ♭7 | B♯, D× becomes B, D♯ | 2 |
| G♯m7♭5 | 1 ♭3 ♭5 ♭7 | B♯, D× becomes B, D | 2 |
| G♯7sus4 | 1 4 5 ♭7 | B♯, D× becomes C♯, D♯ | 2 |
| G♯6 | 1 3 5 6 | D×, F♯ becomes D♯, E♯ | 2 |
| G♯add9 | 1 3 5 9 | D×, F♯ becomes D♯, A♯ | 2 |

## Set theory

- Absolute pitch classes: {8, 0, 4, 6}
- Relative pitch classes: [0, 4, 8, 10]
- Normal order: [4, 6, 8, 0]
- Prime form: (0248)
- Forte number: 4-24
- Interval vector: <020301>

## Frequencies (close root position)

| Note | MIDI | Frequency |
| --- | --- | --- |
| G♯3 | 56 | 207.65 Hz |
| B♯4 | 60 | 261.63 Hz |
| D×4 | 64 | 329.63 Hz |
| F♯4 | 66 | 369.99 Hz |

## Questions and answers

### What notes are in G♯aug7?

G♯aug7 contains G♯, B♯, D× and F♯. The formula is 1, 3, ♯5, ♭7.

### How do you play G♯aug7 on piano?

Play G♯, B♯, D× and F♯ together. Right hand fingers 2, 3, 4, 5; left hand 5, 4, 3, 2. G♯ and F♯ are black keys; B♯ and D× are white.

### What are the inversions of G♯aug7?

4 positions: root position G♯ B♯ D× F♯, G♯aug7/B♯, G♯aug7/D×, G♯aug7/F♯.

### What is the difference between G♯aug7 and G♯aug?

Drops F♯. 3 of the notes are shared.

### What is an easy G♯aug7 for small hands?

The guide tones, 3 and ♭7 voicing, B♯4 F♯4, spans 6 semitones or about 83 mm.

### What are the frequencies of G♯aug7?

From G♯3 at A440 in 12-TET: 207.65, 261.63, 329.63, 369.99 Hz.

### What is the set class of G♯aug7?

Prime form (0248), Forte 4-24, interval vector &lt;020301&gt;.

### How do I transpose G♯aug7 to another key?

Keep the 1, 3, ♯5, ♭7 formula on the new root. Caug7 is C, E, G♯, B♭; D♭aug7 is D♭, F, A, C♭.

### Is A♭aug7 the same as G♯aug7?

Enharmonically yes: the same piano keys and the same sound, spelled differently.

## Provenance

Every derived value above is computed by the piano.org theory kernel from the root, the quality and the stated parameters. Nothing is hand-entered per chord.

Machine record: https://piano.org/api/knowledge/v1/entities/chord:augmented-7th:g-sharp
Last reviewed: 2026-08-12