Bbm7b5 Half-Diminished
The Bbm7b5 chord is built from the notes Bb – Db – Fb – Ab.
Piano sound loads on first tap.
Also known as
Bb-7b5Bbm7(b5)Bbm7(no5)b5Bbmin7b5BbøBbø7
Chord tones, one by one
BbRoot
Root
The fundamental note the chord is built on — Bb.
DbThird
Minor third
Three semitones — makes the chord minor (darker, sadder).
FbFifth
Diminished fifth (♭5)
Six semitones — a flat fifth. Creates instability, typical of m7♭5 and diminished chords.
AbSeventh
Minor seventh (♭7)
Ten semitones — the dominant/minor seventh. Adds bluesy tension (7, m7).
🎼 Related scales
🎹 Modal analysis
This chord implies the Locrian scale; its characteristic note is the unstable ♭5.
🎸 Genres
Modern jazz · Post-bop · Fusion
🎤 Artists who made it famous
Richard Wagner