Key

BbmMaj7b5 guitar chord

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About BbmMaj7b5

BbmMaj7b5 names three separate instructions: a minor 3rd, , and major 7th. The result is Bb, Db, Fb and A.

The flat 5th is the only change from . It must sound, or the voicing is only . This is neither a half-diminished nor diminished-seventh chord.

Also written BbmM7b5 or Bbm(maj7)b5.

Bb diminished scale
+CEbGbG
Contains BbmMaj7b5 and adds ninth, eleventh, sharp fifth and thirteenth.

open strings
open strings
A → G
Replace the major seventh with the diminished seventh.
See Bbdim7 chord →
Db → D
Raise the minor third to the major third.
See Bbmaj7b5 chord →
A → Ab
Lower the major seventh to the flat seventh.
See Bbm7b5 chord →
Fb → F
Raise the flat fifth to the fifth.
See BbmMaj7 chord →

The common shapes and the derived voicings come from different places, and both are explained in how this site is built.