Bb7b11 Chord
Chord Tones
| Interval | Note |
|---|---|
| Perfect 1st | Bb |
| Major 3rd | D |
| Augmented 5th | Gb |
| Minor 7th | Ab |
| b11 | ? |
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Pentad (five-note chord) rooted on Bb（Chord Tones: Bb, D, Gb, Ab）
| Interval | Note |
|---|---|
| Perfect 1st | Bb |
| Major 3rd | D |
| Augmented 5th | Gb |
| Minor 7th | Ab |
| b11 | ? |
