Aadd9 Chord
Chord Tones
| Interval | Note |
|---|---|
| Perfect 1st | A |
| Major 3rd | C# |
| Perfect 5th | E |
| Major 9th | B |
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Tetrad (four-note chord) rooted on A（Chord Tones: A, C#, E, B）
| Interval | Note |
|---|---|
| Perfect 1st | A |
| Major 3rd | C# |
| Perfect 5th | E |
| Major 9th | B |
