A 9#11 Guitar Chord | Play, Hear and Practice Interactively
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The A 9#11 chord, a rich and complex sound, belongs to the Dominant Chords family. It's built from the notes A, C#, E, G, B, and D#, corresponding to the intervals Root (1), Major Third (3), Perfect Fifth (5), Minor Seventh (b7), Major Ninth (9), and Augmented Fourth (#11). To truly grasp this unique chord, use the interactive fretboard tool at the top of this page. You can visualize every fingering, listen to the chord played as a strum or arpeggio, and even check your own playing accuracy with real-time microphone feedback.
The A 9#11 chord is often found in jazz and blues, adding a distinctive, colorful sound due to its extended intervals. To dive deeper into the theory behind building such complex chords, explore our guide on Chord Construction. As a member of the dominant family, understanding its function is key; learn more with our tutorial on Dominant Chords. Specifically for its advanced extensions, check out our insights on Ninth Chords. Once you're comfortable with the fingerings, practice smooth transitions using our tips to Improve Chord Changes.
Below, you'll discover comprehensive resources including chord diagrams (ranked from easiest open positions to more advanced shapes), in-depth music theory explanations, popular songs that feature the A 9#11, and a list of keys where it commonly appears. Before you scroll, we highly recommend engaging with the interactive tool above. Set a rhythm with the drum & BPM tool, play the chord, and use the mic feedback to refine your technique. This hands-on, real-time practice is the fastest way to master new chords and build lasting muscle memory.
Notes of the A 9(#11) chord:
Chord Formula:
A9(#11) Guitar Chord Voicings
Position 1
Barre
Movable
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FAQ
What notes and intervals compose the A 9(#11) chord?
The A 9(#11) chord is built from the notes A, C#, E, G, B, and D#. These correspond to the intervals 1 (Root), 3 (Major Third), 5 (Perfect Fifth), b7 (Minor Seventh), 9 (Major Ninth), and #11 (Augmented Fourth) respectively.
Why is the A 9(#11) chord considered a 'Dominant Chord'?
The A 9(#11) chord belongs to the Dominant Chords family because its fundamental structure includes a root, major third, perfect fifth, and a minor seventh (A, C#, E, G), which defines a dominant 7th chord. The '9' and '#11' are extensions built upon this dominant 7th foundation.
What does the '#11' signify in the A 9(#11) chord name?
The '#11' in A 9(#11) refers to an Augmented Fourth interval from the root. This is a tension that adds a specific, rich color and depth to the chord, making it distinct from other dominant chords without this extension.
In what musical styles is the A 9(#11) chord commonly used?
Due to its distinctive and colorful sound, the A 9(#11) chord is frequently used in jazz and blues music. It provides a sophisticated harmonic texture often sought after in these genres.
Why is the A 9(#11) chord described as advanced and not for beginners?
The A 9(#11) chord is considered advanced because it includes multiple extensions (the 9th and #11th) beyond a basic triad or seventh chord. This complexity often requires more sophisticated fingerings and a deeper understanding of music theory to play and utilize effectively.
How does the A 9(#11) chord achieve its distinctive sound?
The A 9(#11) chord gets its distinctive sound from the combination of its dominant 7th foundation with the added major ninth and especially the augmented eleventh. The #11 interval, in particular, introduces a unique tension and 'rich color' that gives the chord its characteristic depth and sophisticated quality.