Bb9 piano chord — the keys, the inversions, the theory
Bb9 is a ninth chord built from Bb, D, F, Ab, C. Below: the keys to press, every inversion with its own diagram, the intervals it is made of, the keys whose scale contains it, and a progression that actually uses it. Press any diagram to hear it.
Bb9
Bb · D · F · Ab · C
Semitones above the root: 0 – 4 – 7 – 10 – 14
A major third with a flattened seventh above it: unstable on purpose, and it wants to resolve a fourth up.
Inversions of Bb9
Root position
Bb · D · F · Ab · C · bass Bb
Inversion 1
D · F · Ab · Bb · C · bass D
Inversion 2
F · Ab · Bb · C · D · bass F
Inversion 3
Ab · Bb · C · D · F · bass Ab
Same chord, different note at the bottom. Press a diagram to hear it — inversions are how you move between chords without jumping your hand across the keyboard.
Keys that contain Bb9
- EbV
In Eb it does this job: I – V – vi – IV
- Eb
- Bb9
- Cm
- Ab