Key

GmMaj7b5 guitar chord

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About GmMaj7b5

GmMaj7b5 names three separate instructions: a minor 3rd, , and major 7th. The result is G, Bb, Db and F#.

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 GmM7b5 or Gm(maj7)b5.

G diminished scale
+ACEbE
Contains GmMaj7b5 and adds ninth, eleventh, sharp fifth and thirteenth.

F# → Fb
Replace the major seventh with the diminished seventh.
See Gdim7 chord →
Bb → B
Raise the minor third to the major third.
See Gmaj7b5 chord →
F# → F
Lower the major seventh to the flat seventh.
See Gm7b5 chord →
Db → D
Raise the flat fifth to the fifth.
See GmMaj7 chord →

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