AbØ9 Chord
Chord Tones
| Interval | Note |
|---|---|
| Perfect 1st | Ab |
| Minor 3rd | B |
| Diminished 5th | D |
| Major 9th | Bb |
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Tetrad (four-note chord) rooted on Ab（Chord Tones: Ab, B, D, Bb）
| Interval | Note |
|---|---|
| Perfect 1st | Ab |
| Minor 3rd | B |
| Diminished 5th | D |
| Major 9th | Bb |
