F7♭9
F Dominant 7th Flat 9 — a dominant with a dark flattened ninth — sharp tension that resolves with real drama, especially into minor.
The keys
F – A – C – E♭ – G♭
What's inside F7♭9
| Note | Interval from root | Degree |
|---|---|---|
| F | Root | 1 |
| A | Major 3rd | 3 |
| C | Perfect 5th | 5 |
| E♭ | Minor 7th | b7 |
| G♭ | Flat 9th | b9 |
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) | F2 – E♭3 |
| Right (colour) | A4 – G♭5 |
Where F7♭9 lives
Hard resolution
F7♭9 → B♭m9
Altered dominants resolve with maximum drama — especially into minor.
Chromatic approach
Cm7 → F7♭9 → B♭
The alteration sharpens the pull of the standard two-five.
Put F7♭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 →