Formula and Structure of the Bbm7b5 Chord
Interval formula from the root note: 1 — b3 — b5 — b7. The chord consists of the following notes:
- Bb — unison and the main tonal anchor.
- Db — minor third with a melancholic character and gentle lyricism.
- E — diminished fifth with tritone tension, best used cautiously in the bass.
- Ab — minor seventh with dominant pull toward the tonic.
Together, these notes form the harmonic foundation of the Bbm7b5 chord, defining its sound and role in the musical context.
Alternative Names for the Bbm7b5 Chord
This chord may appear under different names:
- Bbø7
- Bbø
All variants refer to the same harmonic structure.
Using the Bbm7b5 Chord
Place the b5 above the bass to soften the character. Add the 9 or 11 for extension, spacing them apart from the b3 and b7. Fits well in minor II–V–I and jazz ballads.
Conclusion
Bbm7b5 is an expressive and versatile chord. Learn several fingerings, experiment with different positions and voice spacing, then try weaving it into your own playing — this will help you quickly find your unique tone.
