A♯maj7: A♯/B♭ Major 7th Piano Chord

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

Scale degree, note, and interval measured from the root.
Degree	Note	Interval from root	Semitones
1	A♯	Perfect unison	0
3	C×	Major third	4
5	E♯	Perfect fifth	7
7	G×	Major seventh	11

Construction

A♯ Major 7th = Root + Major 3rd + Perfect 5th + Major 7th = A♯, C♯♯, E♯, G♯♯

Note	Interval	Degree
A♯	Root	1
C♯♯	Major 3rd	3
E♯	Perfect 5th	5
G♯♯	Major 7th	7

Fingering

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

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

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

A♯ Major 7th Inversions

Root position
A♯ – C♯♯ – E♯ – G♯♯
1st inversion (A♯maj7/C♯♯)
C♯♯ – E♯ – G♯♯ – A♯
2nd inversion (A♯maj7/E♯)
E♯ – G♯♯ – A♯ – C♯♯
3rd inversion (A♯maj7/G♯♯)
G♯♯ – A♯ – C♯♯ – E♯

Key Signature

A chord has no key signature of its own, but the A♯ Major 7th is the tonic (I) chord of A♯ Major, whose key signature has 2 flats (B♭, E♭).

B♭E♭

Order of flats

Flats are added in a fixed order — the reverse of the sharp order. Each new flat key adds the next flat on the list.

B♭E♭A♭D♭G♭C♭F♭

Mnemonic: Battle Ends And Down Goes Charles’ Father

Chords in the Key of A♯ Major

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

I — A♯ Major (major)

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

Scales That Include the A♯ Major 7th

Bb Major (Imaj7)
F Major (IVmaj7)
D Minor (♭VImaj7)
G Minor (♭IIImaj7)
C Dorian (VII)
D Phrygian (VI)
Eb Lydian (V)
F Mixolydian (IV)

A♯ Major 7th : Frequently Asked Questions

What is the A♯ Major 7th chord on piano?

The A♯ Major 7th chord contains the notes A♯ – C♯♯ – E♯ – G♯♯. On piano, play these notes together to sound the chord.

What is the A# piano chord?

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

What notes are in the A# Major 7th chord?

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

How is the A# Major 7th chord used in music?

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

What is the fingering for A# Major 7th?

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

What are the inversions of A# Major 7th?

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

A♯ Major 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	A♯3 C×4 E♯4 G×4	11	151 mm	none	identical
Close, first inversion	C×4 E♯4 G×4 A♯4	8	110 mm	none	identical
Close, second inversion	E♯4 G×4 A♯4 C×5	9	124 mm	none	identical
Close, third inversion	G×4 A♯4 C×5 E♯5	8	110 mm	none	identical
Drop 2	E♯3 A♯3 C×4 G×4	16	220 mm	none	identical
Drop 3	C×3 A♯3 E♯4 G×4	19	261 mm	none	identical
Drop 2 and 4	A♯2 E♯3 C×4 G×4	23	316 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	A♯2 G×3 C×4	16	220 mm	omits E♯	subset
Guide tones, 3 and 7	C×4 G×4	7	96 mm	omits A♯ and E♯	subset
Rootless close	C×4 E♯4 G×4	7	96 mm	omits A♯	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	A♯	A♯3, C×4, E♯4, G×4	7	11	151 mm
First inversion: A♯maj7/C×	C×	C×4, E♯4, G×4, A♯4	6/5	8	110 mm
Second inversion: A♯maj7/E♯	E♯	E♯4, G×4, A♯4, C×5	4/3	9	124 mm
Third inversion: A♯maj7/G×	G×	G×4, A♯4, C×5, E♯5	4/2	8	110 mm

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

Progression	Key	Role	Sequence	Voice leading
♭VI, iv, i, v	D minor	♭VImaj7	B♭maj7 to Gm7 to Dm7 to Am7	A♯maj7 opens the phrase
i, ♭VI	D minor	♭VImaj7	Dm7 to B♭maj7	3 tones held from Dm7
IV, V, I	F major	IVmaj7	B♭maj7 to C7 to Fmaj7	A♯maj7 opens the phrase
I, IV	F major	IVmaj7	Fmaj7 to B♭maj7	2 tones held from Fmaj7
♭III, ♭VI, ii, v	G minor	♭IIImaj7	B♭maj7 to E♭maj7 to Am7♭5 to Dm7	A♯maj7 opens the phrase
i, ♭III	G minor	♭IIImaj7	Gm7 to B♭maj7	3 tones held from Gm7
ii, V, I	B♭ major	Imaj7	Cm7 to F7 to B♭maj7	2 tones held from F7
IV, I	B♭ major	Imaj7	E♭maj7 to B♭maj7	2 tones held from E♭maj7
I, vi, ii, V	B♭ major	Imaj7	B♭maj7 to Gm7 to Cm7 to F7	A♯maj7 opens the phrase

Root motion, common tones and voice displacement are computed from pitch class sets. Roman numerals follow common practice functional harmony.

Which keys it belongs to

Key	Roman numeral	Function
D minor	♭VImaj7	Pre-dominant colour
F major	IVmaj7	Subdominant, away from home
G minor	♭IIImaj7	Relative-major colour
B♭ major	Imaj7	Tonic, home

Classification system: common-practice functional harmony.

Change one note

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

Chord	Change	Formula	Common tones
A♯maj9	adds B♯	1 3 5 7 9	4
A♯	drops G×	1 3 5	3
A♯7	G× becomes G♯	1 3 5 ♭7	3
A♯mMaj7	C× becomes C♯	1 ♭3 5 7	3
A♯6	G× becomes F×	1 3 5 6	3
A♯add9	G× becomes B♯	1 3 5 9	3
A♯9	G× becomes G♯, B♯	1 3 5 ♭7 9	3
A♯m	C×, G× becomes C♯	1 ♭3 5	2
A♯aug	E♯, G× becomes E×	1 3 ♯5	2
A♯sus2	C×, G× becomes B♯	1 2 5	2
A♯sus4	C×, G× becomes D♯	1 4 5	2
A♯m7	C×, G× becomes C♯, G♯	1 ♭3 5 ♭7	2

Frequencies

Note	MIDI	Frequency
A♯3	58	233.08 Hz
C×4	62	293.66 Hz
E♯4	65	349.23 Hz
G×4	69	440.00 Hz

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

Set theory: prime form, Forte number, interval vector

Absolute pitch class set: {10, 2, 5, 9}
Normal order: [9, 10, 2, 5]
Prime form: (0158)
Forte number: 4-20
Interval vector: <101220>

Pair	Interval	Semitones	Interval class
A♯ to C×	Major third	4	4
A♯ to E♯	Perfect fifth	7	5
A♯ to G×	Major seventh	11	1
C× to E♯	Minor third	3	3
C× to G×	Perfect fifth	7	5
E♯ to G×	Major third	4	4

Where these facts come from

Every value on this page is derived from the note formula for a major 7th applied to the root A♯, 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.

A♯ Major 7th

Fingerings

A♯ Major 7th: notes and degrees