Bb9 chord
B-flat dominant ninth, also written A#9. One shape on the neck below, with the notes it's built from and the keys it belongs to.
Notes
- Bb
- 1
- D
- 3
- F
- 5
- Ab
- b7
- C
- 9
The major third is what makes it sound bright and settled.
The minor seventh adds a bluesy edge and leaves the chord sounding unfinished.
The 9th adds color on top without changing whether it's major or minor.
How to play Bb9
- Root on A
- x10111
Want to know why this chord works where it does? The Intermediate lessons cover it, and founding players get them first.
Keys with Bb9
Bb9 uses only notes from Eb major and C minor. It sounds most at home in Eb major.