B♭9
Bb Dominant 9th — a dominant seventh widened with the ninth — fuller, funkier movement toward the resolution.
The keys
B♭ – D – F – A♭ – C
What's inside B♭9
| Note | Interval from root | Degree |
|---|---|---|
| B♭ | Root | 1 |
| D | Major 3rd | 3 |
| F | Perfect 5th | 5 |
| A♭ | Minor 7th | b7 |
| C | Major 9th | 9 |
A working voicing
Split the chord between two hands the way working players do — a solid shell low down, the colour tones up top:
| Hand | Keys |
|---|---|
| Left (shell) | B♭2 – A♭3 |
| Right (colour) | D5 – C6 |
Where B♭9 lives
As the I chord
B♭9 → E♭ → F → B♭9
The classic I–IV–V–I motion with this chord as home.
In a ii–V–I
Cm7 → F7 → B♭9
The strongest cadence in harmony, resolving onto this chord.
Put B♭9 under your fingers
Hear every voicing, see the keys light up, and drill it in the interactive Chord & Voicing Lab.
Open the Chord & Voicing Lab →