BbØ9 Chord
Chord Tones
| Interval | Note |
|---|---|
| Perfect 1st | Bb |
| Minor 3rd | Db |
| Diminished 5th | E |
| Major 9th | C |
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Tetrad (four-note chord) rooted on Bb（Chord Tones: Bb, Db, E, C）
| Interval | Note |
|---|---|
| Perfect 1st | Bb |
| Minor 3rd | Db |
| Diminished 5th | E |
| Major 9th | C |
