A#7(#11) Guitar Chord Chart and Fingering

Spell A#7(#11), or A# seventh sharp eleven, from A# and you get A#, C##, E#, G# and D##: a root, a major third, a perfect fifth, a minor seventh and a sharp eleventh.

Two notes carry the dominant pull, the major third C## and the minor seventh G#, which sit a tritone apart. Bb7(#11) is its enharmonic twin, with the same pitches and different note names. Every tone of A#7(#11) sits inside the A# Lydian Dominant scale, the fourth mode of the melodic minor scale, so it is a natural pool of notes for lines over the chord.

Think of it as a dominant seventh with a lydian twist, where the raised fourth of the scale becomes a raised eleventh in the chord.

A# 7th with sharp 11th guitar chord is also written as A#7(#11), A#7#11 or A#7+11.

Notes in the A# 7(#11) chord:

A# C## E# G# D##

Chord Structure:

Formula: 1 3 5 b7 #11

A# 7(#11) Chord Interactive Fretboard

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Play This Chord With Other Roots

C 7(#11) | D 7(#11) | E 7(#11) | F 7(#11) | G 7(#11) | A 7(#11) | B 7(#11) | C#7(#11) | D#7(#11) | F#7(#11) | G#7(#11) | A#7(#11) | Ab7(#11) | Bb7(#11) | Db7(#11) | Eb7(#11) | Gb7(#11)

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Created by

Giancarlo Facoetti

Giancarlo is a musician (teaching guitar since 2000), software engineer, AI consultant and published researcher

FAQ

Which notes are in the A# seventh sharp eleven chord?

A#, C##, E#, G# and D##. The first four make an A# seventh chord, and D## is the sharp eleventh. It sounds like E natural.

Is A#7(#11) the same as Bb7(#11)?

Yes, they sound identical. Bb7(#11) is spelled Bb, D, F, Ab and E, which needs no double sharps, while A#7(#11) uses A#, C##, E#, G# and D##.

Why does A#7(#11) contain C##, E# and D##?

Chord tones take letters in steps of a third: A, C, E, G and, for the eleventh, D. The major third is C##, the fifth is E# and the sharp eleventh is D##, which sound like D, F and E.

Which scale fits A#7(#11)?

The A# Lydian Dominant scale: A#, B#, C##, D##, E#, F## and G#. It contains all five chord tones and is the fourth mode of the melodic minor scale.

What does the #11 in A#7(#11) mean?

It is the eleventh degree raised by a half step, written D## on A#. Its pitch matches a flattened fifth, a tritone from the root, and it lies a half step lower than the perfect fifth E# one octave up.