About the A augmented major nine chord
A augmented major nine sits outside the plain diatonic set, so it is borrowed to add color and tension. Think of it as an A augmented major ninth chord.
Its notes are A, C♯, E♯, G♯, and B. The intervals are a major third, an augmented fifth, a major seventh, and a major ninth.
Inversions
A augmented major nine (root position)
Notes and intervals
| 1 | A | Root |
|---|---|---|
| 2 | C sharp | Major 3rd |
| 3 | E sharp | Augmented 5th |
| 4 | G sharp | Major 7th |
| 5 | B | Major 9th |
Shapes
Chromatic
Circle of Fifths
Other A chords
Simpler triads
Suspended
A suspended two chordA suspended four chordA seven suspended four chordA nine suspended four chordA thirteen suspended four chord
Sixths and sevenths
A six chordA minor six chordA minor flat six chordA seven chordA major seven chordA minor seven chordA minor seven flat five chordA diminished seven chordA minor major seven chordA major seven flat five chordA major seven sharp five chordA minor major seven flat five chord
Extensions
A nine chordA add nine chordA major nine chordA minor nine chordA eleven chordA thirteen chordA six nine chordA minor add nine chordA major eleven chordA major thirteen chordA minor eleven chordA minor thirteen chordA minor six nine chordA minor major nine chordA minor major eleven chord
Altered
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