G♯aug7: G♯/A♭ Augmented 7th Piano Chord

Root position: either hand, fingers low note to high
Hand	Notes	Fingers
Right	G♯, B♯, D×, F♯	2-3-4-5
Left	G♯, B♯, D×, F♯	5-4-3-2

Scale degree, note, and interval measured from the root.
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

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

Fingering

Note	Key color	Right hand	Left hand
G♯	black	index finger (2)	little finger (5)
B♯	white	middle finger (3)	ring finger (4)
D♯♯	white	ring finger (4)	middle finger (3)
F♯	black	little finger (5)	index finger (2)

Right hand: index finger (2) on G♯, middle finger (3) on B♯, ring finger (4) on D♯♯, little finger (5) on F♯.

Left hand: little finger (5) on G♯, ring finger (4) on B♯, middle finger (3) on D♯♯, index finger (2) on F♯.

G♯ Augmented 7th Inversions

Root position
G♯ – B♯ – D♯♯ – F♯
1st inversion (G♯aug7/B♯)
B♯ – D♯♯ – F♯ – G♯
2nd inversion (G♯aug7/D♯♯)
D♯♯ – F♯ – G♯ – B♯
3rd inversion (G♯aug7/F♯)
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.

Chords in the Key of G♯ Major

These are the triads built on each degree of G♯ Major:

I — G♯ Major (major)

Degree	Numeral	Chord	Quality
1	I	G♯ Major	Major
2	ii	A♯ Minor	Minor
3	iii	B♯ Minor	Minor
4	IV	C♯ Major	Major
5	V	D♯ Major	Major
6	vi	E♯ Minor	Minor
7	vii°	F♯♯ Diminished	Diminished

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:

A♭ 7♯5→

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 is the G# piano chord?

The G# piano chord (written G♯ Augmented 7th) uses the same keys: G♯ – B♯ – D♯♯ – F♯. The # and ♯ symbols name the same black key.

What notes are in the G# Augmented 7th chord?

G# Augmented 7th is built from the G# root. Check the interactive keyboard above for exact notes and fingering.

How is the G# Augmented 7th chord used in music?

G# Augmented 7th appears in jazz, pop, and classical contexts. Its sound depends on the chord quality (Augmented 7th).

What is the fingering for G# Augmented 7th?

See the fingering chart above. Right hand typically uses thumb on root. Left hand uses pinky on root.

What are the inversions of G# Augmented 7th?

Use the inversion buttons above to see each inversion with notes, fingering, and staff notation.

G♯ Augmented 7th in detail

Exact

Every pitch class is present and nothing outside the chord is added.

Type	Notes	Semitones	Span	Omissions and additions	Set relation
Close, root position	G♯3 B♯4 D×4 F♯4	10	138 mm	none	identical
Close, first inversion	B♯4 D×4 F♯4 G♯4	8	110 mm	none	identical
Close, second inversion	D×4 F♯4 G♯4 B♯5	8	110 mm	none	identical
Close, third inversion	F♯4 G♯4 B♯5 D×5	10	138 mm	none	identical
Drop 2	D×3 G♯3 B♯4 F♯4	14	193 mm	none	identical
Drop 3	B♯3 G♯3 D×4 F♯4	18	248 mm	none	identical
Drop 2 and 4	G♯2 D×3 B♯4 F♯4	22	303 mm	none	identical

Reduced

A subset of the pitch classes: the identity is incomplete rather than altered.

Type	Notes	Semitones	Span	Omissions and additions	Set relation
Shell, root ♭7 3	G♯2 F♯3 B♯4	16	220 mm	omits D×	subset
Guide tones, 3 and ♭7	B♯4 F♯4	6	83 mm	omits G♯ and D×	subset
Rootless close	B♯4 D×4 F♯4	6	83 mm	omits G♯	subset

Spans are measured centre to centre at a 165 mm octave (standard keyboard geometry).

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

One position per chord tone in the bass. Spans are for close position: voiced inversions appear under Voicings.

Change one note

Chords a single note away, and what moving that note does.

Chord	Change	Formula	Common tones
G♯aug	drops F♯	1 3 ♯5	3
G♯7	D× becomes D♯	1 3 5 ♭7	3
G♯9	D× becomes D♯, A♯	1 3 5 ♭7 9	3
G♯	D×, F♯ becomes D♯	1 3 5	2
G♯maj7	D×, F♯ becomes D♯, F×	1 3 5 7	2
G♯m7	B♯, D× becomes B, D♯	1 ♭3 5 ♭7	2
G♯m7♭5	B♯, D× becomes B, D	1 ♭3 ♭5 ♭7	2
G♯7sus4	B♯, D× becomes C♯, D♯	1 4 5 ♭7	2
G♯6	D×, F♯ becomes D♯, E♯	1 3 5 6	2
G♯add9	D×, F♯ becomes D♯, A♯	1 3 5 9	2

Frequencies

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

Reference pitch A440, 12-TET, close root position.

Set theory: prime form, Forte number, interval vector

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

Pair	Interval	Semitones	Interval class
G♯ to B♯	Major third	4	4
G♯ to D×	Minor sixth	8	4
G♯ to F♯	Minor seventh	10	2
B♯ to D×	Major third	4	4
B♯ to F♯	Tritone	6	6
D× to F♯	Major second	2	2

Where these facts come from

Every value on this page is derived from the note formula for a augmented 7th applied to the root G♯, using standard music theory. Nothing here is hand-entered per chord, so the notes, intervals, inversions and frequencies cannot drift out of agreement with each other. Pitches assume 12-TET at A440.

G♯ Augmented 7th

Fingerings

G♯ Augmented 7th: notes and degrees