A9 Guitar Chord | Play, Hear and Master Interactively
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The A 9 chord, a member of the Dominant Chords family, is built from the notes A, C#, E, G, and B, corresponding to the intervals 1 (Root), 3 (Major Third), 5 (Perfect Fifth), b7 (Minor Seventh), and 9 (Major Ninth). Dive into its sound and fingerings using the interactive fretboard tool at the top of this page, where you can visualize shapes, hear the chord played as a strum or arpeggio, and get instant feedback on your playing with the real-time microphone feature.
This extended chord provides a rich, complex sound, frequently heard in jazz and blues compositions. Understanding the intervals that form it is key to unlocking its potential; explore more about how these chords are constructed with our Chord Construction guide. For a deeper dive into its specific type, refer to our comprehensive guide on Ninth Chords, or understand its role within the broader Dominant Chord family. Once you're comfortable with the fingerings, focusing on smooth chord changes will help integrate it seamlessly into your playing.
Scrolling further down, you'll discover detailed chord diagrams, presented from the simplest open positions to more advanced movable shapes, alongside deeper music theory insights, popular songs featuring the A9 chord, and the musical keys where it commonly appears. Before you explore these static resources, take a moment to engage with the interactive tool above. Set a tempo with the built-in drum machine, strum the chord, and use the mic feedback to confirm your finger placement and intonation. This active learning approach will significantly accelerate your mastery of the A9 chord.
Notes of the A 9 chord:
Tones in the Dominant Ninth chord:
A9 Guitar Chord Shapes
Position 1
Open
Position 2
Barre
Open
Position 3
Barre
Open
Find more shapes in our all guitar chords online library. If you
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You can also use this accessible A9 chord page, with written diagram instructions and screen-reader support for blind users.
FAQ
What notes make up an A9 chord?
The A9 chord is composed of five distinct notes: A (Root), C# (Major Third), E (Perfect Fifth), G (Minor Seventh), and B (Major Ninth). These notes correspond to the intervals 1, 3, 5, b7, and 9.
What is a 'Dominant Chord' and why is A9 part of that family?
A 'Dominant Chord' is characterized by its inclusion of a minor seventh (b7) interval, alongside the root, major third, and perfect fifth. The A9 chord is a dominant chord because it contains the G note, which is the minor seventh of A, giving it a distinct sound often used to create tension that resolves to another chord.
How is the '9' interval in the A9 chord derived?
The '9' in the A9 chord refers to the Major Ninth interval, which is the B note in this case. This note is added to a standard dominant seventh chord (which already includes the root, major third, perfect fifth, and minor seventh), extending its harmonic complexity.
In what musical styles is the A9 chord typically used?
The A9 chord, with its unique and complex sound, is commonly used in genres such as jazz and blues. Its extended harmony adds depth and sophistication to chord progressions, making it a favorite for adding richer textures.