Practice A#maj9 Guitar Chord with Interactive Feedback

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The A# major ninth chord (A#maj9) is spelled A#, C##, E#, G## and B#. In a major key, maj9 chords are built on the first and fourth degrees, just like maj7.

There are three voicings on this page, one of them with open strings and two using a barre. For soloing or filling in melody, the A# major scale contains every note of the chord. A#maj9 sounds identical to Bbmaj9, spelled Bb, D, F, A and C, This spelling needs C##, G##, E# and B#, so Bbmaj9 is the easier name to read.

Press play on the fretboard player at the top to hear A#maj9 strummed and as an arpeggio.

A# major 9th guitar chord is also written as A#maj9, A#M9, A#Δ9 or A#ma9.

Notes of the A# maj9 chord:

A# C## E# G## B#

How the Major Ninth chord is built:

#11

A# Maj9 Guitar Chord Diagrams

Position 1 Open

Finger Positions

Mute the low E string
Let the D string play without pressing any fret
Place your index finger (1) on the fret 1 of the A string
Place your middle finger (2) on the fret 1 of the B string
Place your ring finger (3) on the fret 1 of the high E string
Place your pinky finger (4) on the fret 2 of the G string

Position 2 Barre Movable

Finger Positions

Mute the B string
Mute the high E string
Place your index finger (1) on the fret 5 of the A and G strings at the same time
Place your middle finger (2) on the fret 6 of the low E string
Place your pinky finger (4) on the fret 7 of the D string

Position 3 Barre Movable

Finger Positions

Mute the low E string
Mute the A string
Place your index finger (1) on the fret 5 of the G and high E strings at the same time
Place your middle finger (2) on the fret 6 of the B string
Place your pinky finger (4) on the fret 8 of the D string

Find more shapes in our all guitar chords online library. If you prefer a printable pdf, download the Free Guitar Chords Chart Pdf

Play This Chord With Other Roots

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Created by

Giancarlo Facoetti

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

FAQ

What notes are in the A#maj9 chord?

A#maj9 (A# major ninth) contains A#, C##, E#, G## and B#. That is a major triad with a major seventh and a major ninth stacked on top, giving the interval pattern 1, 3, 5, 7, 9.

Is A#maj9 the same chord as Bbmaj9?

Yes, they sound the same because the notes are enharmonic. Bbmaj9 is spelled Bb, D, F, A and C, while A#maj9 needs C##, G##, E# and B#, so the Bb spelling is easier to read.

Why does A# major ninth contain C## and G##?

In A# major the third is C## and the seventh is G##, because every note keeps its own letter name. A major third up from A# lands on C## and a major seventh up from A# lands on G##. The ninth, B#, is the second scale note an octave higher.

How many ways are there to play A#maj9 on guitar?

There are three voicings, one using open strings and two using a barre. They span from the 1st fret up to the 8th fret.

Which scale fits A#maj9 for soloing?

The A# major scale contains every chord tone: A#, B#, C##, D#, E#, F## and G##. Over A#maj9 it supplies all five chord notes plus the passing tones between them.