Guitar Chord Dictionary: A# Minor Eleventh Chords
A#, C#, E#, G#, B# and D# spell the A#m11 chord (A# minor eleventh). It sounds identical to Bbm11, whose notes Bb, Db, F, Ab, C and Eb are simpler to read.
The sharp spelling needs E# and B#, which are the same pitches as F and C, so a chart in a flat key will write Bbm11 instead. Counting from the root, the notes are the root, minor third, fifth, minor seventh, ninth (B#) and eleventh (D#). Both names describe the same pitches, so only the spelling changes with the key. All six belong to the A# Dorian scale.
A# minor 11th guitar chord is also written as A#m11, A#min11 or A#-11.
A#m11 Chord Notes and Formula
Notes in the A# m11 chord:
Chord Structure:
Formula: 1 b3 5 b7 9 11
Same chord, different name: A#m11 is also written as Bbm11 (Bb minor eleventh).
A# M11 Chord Interactive Fretboard
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Chords That Go With A#m11
One key where A#m11 fits is Db major, where it works as the vi chord. These are the main chords of that key, the ones you will often hear around it:
See every key in the guitar keys chart, or build a progression with these chords in the chord progression generator.
More A# Chords
Want to know how this chord is built? Read chord symbols and intervals, or browse all A# guitar chords.
Created by
Giancarlo is a musician (teaching guitar since 2000), software engineer, AI consultant and published researcher
FAQ
What notes does A#m11 contain?
A#m11 is spelled A#, C#, E#, G#, B# and D#. That is A#m9 with D# added as the eleventh, giving six different notes.
Why is the eleventh in A# minor eleventh written D#?
The eleventh is the fourth degree counted an octave up, so it takes the letter D. A perfect fourth up from A# is D#, five semitones away, and it sounds like Eb.
Is A#m11 the same chord as Bbm11?
Yes. A# and Bb are one pitch, so both symbols describe the same chord. Bbm11 is written Bb, Db, F, Ab, C and Eb, which avoids E# and B#.
Which scale can be played over A#m11?
A# Dorian fits: A#, B#, C#, D#, E#, F## and G#. All six notes of A#m11 are in it, and the eleventh D# is its fourth degree.
What is the difference between A#m11 and A#m9?
A#m9 has A#, C#, E#, G# and B#. A#m11 keeps those five notes and adds D#, a perfect fourth up from A# one octave higher.
