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:
Chord Structure:
Formula: 1 3 5 b7 #11
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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.
