Explore and Master the A#7 Guitar Chord
The A#7 chord, or A# dominant seventh, is spelled A#, C##, E# and G#. It sounds exactly like Bb7, which uses the plainer notes Bb, D, F and Ab and is the spelling normally used on charts.
Only three voicings are listed, two of them barres, with the lowest at the 1st fret. The double sharp is the cost of spelling a major third above A#. Its role is V7 in Eb major, where it is written Bb7. Every note belongs to the A# Mixolydian scale.
Press play above to hear it strummed and then arpeggiated.
A# dominant 7th guitar chord is also written as A#7, A#dom7 or A#dom.
Notes of the A# 7 chord:
How to create the Dominant Seventh chord:
Formula: 1 3 5 b7
A# 7 Chord Interactive Fretboard
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A# 7 Guitar Chord Diagrams
Position 1 Barre Movable
Finger Positions
- Mute the low E string
- Place your index finger (1) on the fret 1 of the A, G and high E strings at the same time
- Place your ring finger (3) on the fret 3 of the D string
- Place your pinky finger (4) on the fret 3 of the B string
Position 2 Barre Movable
Finger Positions
- Place your index finger (1) on the fret 6 of the low E, D and high E strings at the same time
- Place your middle finger (2) on the fret 7 of the G string
- Place your ring finger (3) on the fret 8 of the A string
- Place your pinky finger (4) on the fret 9 of the B string
Position 3 Movable
Finger Positions
- Mute the low E string
- Mute the A string
- Place your index finger (1) on the fret 8 of the D string
- Place your middle finger (2) on the fret 9 of the B string
- Place your ring finger (3) on the fret 10 of the G string
- Place your pinky finger (4) on the fret 10 of the high E string
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Created by
Giancarlo is a musician (teaching guitar since 2000), software engineer, AI consultant and published researcher
FAQ
What notes are in A# dominant seventh?
A#7 is spelled A#, C##, E# and G#. The C## is the major third, the E# the perfect fifth and the G# the minor seventh over the root.
Is A#7 the same chord as Bb7?
They use the same pitches, so they sound identical. Bb7 spells them Bb, D, F and Ab, and it is the V7 chord of Eb major. The key of the music decides which name is written.
Why does A#7 contain a double sharp?
The major third over A# has to be some kind of C, because the letters run A, C, E, G. C# is only a minor third over A#, so the note becomes C##, which sounds like D.
Which scale works over A# dominant seventh?
A# Mixolydian spells A#, B#, C##, D#, E#, F## and G#, and it covers all four chord tones. It holds the same pitches as Bb Mixolydian.
How many voicings does A#7 have?
There are 3 voicings, spread from fret 1 to fret 10. Two of them are barre voicings and none uses an open string.
