Finger Positions

G#m7b5/C# diagram
Root Note G#
Name G# half-diminished over C#
Intervals 1P-3m-5d-7m
Relative Minor Fm
Notes C#, G#, B, D, F#
Aliases G#m7b5, G#ø, G#-7b5, G#h7, G#h

How to play the G#m7b5/C# Chord

The G#m7b5/C# is a fundamental dominant chord in guitar music. To play this chord correctly, ensure your fingers are placed precisely on the frets indicated in the diagram above.

Music Theory Analysis

From a theoretical perspective, the G# half-diminished over C# is built using the 1P, 3m, 5d, 7m intervals. In the key of G# Major, this chord functions as the I chord.

Common Progressions

In music composition, the G#m7b5/C# chord is often used to create tension or resolution.

I-V-vi-IV

G# → D# → Fm → C#

vi-IV-I-V

Fm → C# → G# → D#

The Diatonic Family

Understanding the "family" of chords that belong to G# helps with transposition and ear training.

Triads

G# A#m Cm C# D# Fm Gdim

7ths

G#maj7 A#m7 Cm7 C#maj7 D#7 Fm7 Gm7b5

Scale Compatibility

View All Scales
Minor Blues Locrian Locrian Pentatonic Super Locrian Pentatonic Altered Locrian #2 Locrian 6 Dorian #4 Hungarian Major Flamenco Bebop Locrian Half-Whole Diminished Composite Blues Messiaen's Mode #3 Chromatic

* 15 scales found containing the notes C#, G#, B, D, F#.

Acoustic & Digital Analysis

Digital footprint of the G#m7b5/C# chord for MIDI programming and synthesizer sound design.

MIDI Numbers 61, 68, 71, 62, 66
Frequencies (Hz)

277.1826309768721, 415.3046975799451, 493.8833012561241, 293.6647679174076, 369.9944227116344