B♭7♭9

B♭7♭9 is the bb dominant 7th flat 9 chord, spelled B♭ – D – F – A♭ – C♭. a dominant with a dark flattened ninth — sharp tension that resolves with real drama, especially into minor.

The keys
C4C5C6
B♭ – D – F – A♭ – C♭
Practise this chord

Plug in your MIDI keyboard and let Coach Tshepho drill you on B♭7♭9 — it plays the chord, names any wrong notes as you play, and moves you on when you nail it.

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What's inside B♭7♭9
NoteInterval from rootDegree
B♭Root1
DMajor 3rd3
FPerfect 5th5
A♭Minor 7thb7
C♭Flat 9thb9
A working voicing

Split the chord between two hands the way working players do — a solid shell low down, the colour tones up top:

HandKeys
Left (shell)B♭2 – A♭3
Right (colour)D5 – B5
Where B♭7♭9 lives

Hard resolution

B♭7♭9 → E♭m9

Altered dominants resolve with maximum drama — especially into minor.

Chromatic approach

Fm7 → B♭7♭9 → E♭

The alteration sharpens the pull of the standard two-five.

Put B♭7♭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 →
Take it further
Build a progression with it → Reharmonize it →
More Bb chords
B♭ B♭m B♭dim B♭aug B♭sus2 B♭sus4 B♭6 B♭m6 B♭7 B♭maj7 B♭m7 B♭m7♭5 B♭dim7 B♭m(maj7) B♭9 B♭maj9 B♭m9 B♭add9 B♭6/9 B♭m11 B♭13 B♭7♯9 B♭7♯5
Dominant 7th Flat 9 in every key
C7♭9 C♯7♭9 D7♭9 E♭7♭9 E7♭9 F7♭9 F♯7♭9 G7♭9 A♭7♭9 A7♭9 B7♭9
Play it over a groove
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