A 9#11 Guitar Chord | Play, Hear and Practice Interactively

A 9(#11) position 1 guitar chord diagram

The A9(#11) chord, also read as A ninth sharp eleven, is spelled A, C#, E, G, B and D#: a root, a major third, a perfect fifth, a minor seventh, a ninth and a sharp eleventh.

The tool shows a single voicing, a barre shape between fret 4 and fret 5. The A Lydian Dominant scale, the fourth mode of the melodic minor scale, contains all six chord tones and adds a sixth, so it fits the chord from start to finish.

The fretboard at the top labels every note of each shape, so you can see where A, C# and D# fall.

A 9th with sharp 11th guitar chord is also written as A9(#11), A9#11 or A9+11.

Notes of the A 9(#11) chord:

A C# E G B D#

Chord Formula:

Formula: 1 3 5 b7 9 #11

A 9(#11) Chord Interactive Fretboard

Want a structured chord roadmap instead of jumping between pages?
Go to the full guitar chords tutorial.

A 9(#11) Guitar Chord Diagrams

Position 1 Barre Movable

Finger Positions

Mute the A string
Mute the high E string
Place your index finger (1) on the fret 4 of the G and B strings at the same time
Place your middle finger (2) on the fret 5 of the low E string
Place your ring finger (3) on the fret 5 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

C 9(#11) | D 9(#11) | E 9(#11) | F 9(#11) | G 9(#11) | A 9(#11) | B 9(#11) | C#9(#11) | D#9(#11) | F#9(#11) | G#9(#11) | A#9(#11) | Ab9(#11) | Bb9(#11) | Db9(#11) | Eb9(#11) | Gb9(#11)

Want to Learn Everything About Chords?

Check Chords Domination out: a unique ebook that shows you finger positions, note names and intervals in the chords (plus a tones fretboard maps)

You'll learn how to play 44 chords types across all the fretboard, with many voicings and fingerings

In the ebook you can also find maps show you the tones in a chord all along the fretboard. They are incredibly helpful because allow you to:

Create new voicings on the fly, across all the neck
Improvise targeting the right notes
Unlock the fretboard and expand the CAGED system.

In the new ebook, Chords Domination, you'll find the fretboard tones maps for 44 different qualities of chords. Check it out:

Download Free Excerpt Learn More Here

Created by

Giancarlo Facoetti

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

FAQ

What notes are in A9(#11)?

A9(#11) is spelled A, C#, E, G, B and D#. It stacks a major third, perfect fifth, minor seventh, ninth and sharp eleventh on A.

How many ways are there to play A9(#11)?

The fact sheet lists one valid voicing for A9(#11). It is a barre voicing between frets 4 and 5, and none use open strings.

What scale fits A9(#11)?

The A Lydian Dominant scale has A, B, C#, D#, E, F# and G. All six chord tones are in it, and F# is the one extra note.

What does the #11 in A9(#11) mean?

It is the eleventh raised by a half step. Over A the perfect eleventh is D, so the sharp eleventh is D#, an augmented fourth from the root.