D♯aug7: D♯/E♭ Augmented 7th Piano Chord

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

Scale degree, note, and interval measured from the root.
Degree	Note	Interval from root	Semitones
1	D♯	Perfect unison	0
3	F×	Major third	4
♯5	A×	Minor sixth	8
♭7	C♯	Minor seventh	10

Construction

D♯ Augmented 7th = Root + Major 3rd + Minor 6th + Minor 7th = D♯, F♯♯, A♯♯, C♯

Note	Interval	Degree
D♯	Root	1
F♯♯	Major 3rd	3
A♯♯	Minor 6th	♯5
C♯	Minor 7th	♭7

Fingering

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

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

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

D♯ Augmented 7th Inversions

Root position
D♯ – F♯♯ – A♯♯ – C♯
1st inversion (D♯aug7/F♯♯)
F♯♯ – A♯♯ – C♯ – D♯
2nd inversion (D♯aug7/A♯♯)
A♯♯ – C♯ – D♯ – F♯♯
3rd inversion (D♯aug7/C♯)
C♯ – D♯ – F♯♯ – A♯♯

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 D♯ Major

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

I — D♯ Major (major)

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

Same Notes, Other Names

The notes D♯ – F♯♯ – A♯♯ – C♯ aren’t exclusive to this chord. Depending on which note is the bass and how the chord functions, the same pitches also spell:

D♯ 7♯5→

D♯ Augmented 7th : Frequently Asked Questions

What is the D♯ Augmented 7th chord on piano?

The D♯ Augmented 7th chord contains the notes D♯ – F♯♯ – A♯♯ – C♯. On piano, play these notes together to sound the chord.

What is the D# piano chord?

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

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

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

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

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

What is the fingering for D# 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 D# Augmented 7th?

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

D♯ 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	D♯3 F×3 A×3 C♯4	10	138 mm	none	identical
Close, first inversion	F×3 A×3 C♯4 D♯4	8	110 mm	none	identical
Close, second inversion	A×3 C♯4 D♯4 F×4	8	110 mm	none	identical
Close, third inversion	C♯4 D♯4 F×4 A×4	10	138 mm	none	identical
Drop 2	A×2 D♯3 F×3 C♯4	14	193 mm	none	identical
Drop 3	F×2 D♯3 A×3 C♯4	18	248 mm	none	identical
Drop 2 and 4	D♯2 A×2 F×3 C♯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	D♯2 C♯3 F×3	16	220 mm	omits A×	subset
Guide tones, 3 and ♭7	F×3 C♯4	6	83 mm	omits D♯ and A×	subset
Rootless close	F×3 A×3 C♯4	6	83 mm	omits D♯	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	D♯	D♯3, F×3, A×3, C♯4	7	10	138 mm
First inversion: D♯aug7/F×	F×	F×3, A×3, C♯4, D♯4	6/5	8	110 mm
Second inversion: D♯aug7/A×	A×	A×3, C♯4, D♯4, F×4	4/3	8	110 mm
Third inversion: D♯aug7/C♯	C♯	C♯4, D♯4, F×4, A×4	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
D♯aug	drops C♯	1 3 ♯5	3
D♯7	A× becomes A♯	1 3 5 ♭7	3
D♯9	A× becomes A♯, E♯	1 3 5 ♭7 9	3
D♯	A×, C♯ becomes A♯	1 3 5	2
D♯maj7	A×, C♯ becomes A♯, C×	1 3 5 7	2
D♯m7	F×, A× becomes F♯, A♯	1 ♭3 5 ♭7	2
D♯m7♭5	F×, A× becomes F♯, A	1 ♭3 ♭5 ♭7	2
D♯7sus4	F×, A× becomes G♯, A♯	1 4 5 ♭7	2
D♯6	A×, C♯ becomes A♯, B♯	1 3 5 6	2
D♯add9	A×, C♯ becomes A♯, E♯	1 3 5 9	2

Frequencies

Note	MIDI	Frequency
D♯3	51	155.56 Hz
F×3	55	196.00 Hz
A×3	59	246.94 Hz
C♯4	61	277.18 Hz

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

Set theory: prime form, Forte number, interval vector

Absolute pitch class set: {3, 7, 11, 1}
Normal order: [11, 1, 3, 7]
Prime form: (0248)
Forte number: 4-24
Interval vector: <020301>

Pair	Interval	Semitones	Interval class
D♯ to F×	Major third	4	4
D♯ to A×	Minor sixth	8	4
D♯ to C♯	Minor seventh	10	2
F× to A×	Major third	4	4
F× to C♯	Tritone	6	6
A× to C♯	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 D♯, 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.

D♯ Augmented 7th

Fingerings

D♯ Augmented 7th: notes and degrees