Guitar Chord G#m7b5: Structure, Notes and Theory

G#m7b5 — a chord built on the note “G#” with a soft diminished color and a direction toward resolution. Sounds great in minor modes and jazz harmony.

Formula and Structure of the G#m7b5 Chord

Interval formula from the root note: 1 — b3 — b5 — b7. The chord consists of the following notes:

• Ab — unison and the main tonal anchor.
• B — minor third with a melancholic character and gentle lyricism.
• D — diminished fifth with tritone tension, best used cautiously in the bass.
• Gb — minor seventh with dominant pull toward the tonic.

Together, these notes form the harmonic foundation of the G#m7b5 chord, defining its sound and role in the musical context.

Alternative Names for the G#m7b5 Chord

This chord may appear under different names:

• G#ø7
• G#ø

All variants refer to the same harmonic structure.

Using the G#m7b5 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

G#m7b5 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.