B♭7 (B♭ dominant 7th): B♭ D F A♭. Formula 1 3 5 ♭7. A major triad with a minor 7th: the tritone between its 3rd and ♭7 pulls toward the tonic. The V chord of every key, and the I chord of the blues.
Made of4
Contains & part of19
Inversions4
- B♭77
Root position · B♭ D F A♭
- B♭7/D6/5
1st inversion · D F A♭ B♭
- B♭7/F4/3
2nd inversion · F A♭ B♭ D
- B♭7/A♭4/2
3rd inversion · A♭ B♭ D F