The G♯ Diminished chord is a three-note chord made up of G♯, B, and D. It is built from a root, minor third, and diminished fifth.
Construction
G♯ Diminished = Root + Minor 3rd + Diminished 5th = G♯ · B · D
| Note | Interval | Degree |
|---|---|---|
| G♯ | Root | 1 |
| B | Minor 3rd | ♭3 |
| D | Diminished 5th | ♭5 |
G♯ Diminished Inversions
| Position | Notes |
|---|---|
| Root Position | G♯ – B – D |
| 1st Inversion | B – D – G♯ |
| 2nd Inversion | D – G♯ – B |
Key Signature
A Diminished chord is built from symmetrical or ambiguous intervals, so it doesn’t belong to a single key and has no key signature of its own.
How G♯ Diminished functions in a key
The same chord takes on a different harmonic role depending on the key it appears in. Here is where G♯ Diminished sits diatonically across the common keys:
- In A major, G♯ Diminished is the vii° chord — the dominant.
- In F♯ minor, G♯ Diminished is the ii° chord — a predominant.
G♯ Diminished — Frequently Asked Questions
What is the G♯ Diminished chord on piano?
The G♯ Diminished chord contains the notes G♯ – B – D. On piano, play these notes together to sound the chord.
What notes are in the G# Diminished chord?
The G# Diminished chord contains: G# (root), B (minor third), and D (diminished fifth). Both intervals are compressed: the minor third is 3 semitones above the root, and the diminished fifth is 6 semitones — a tritone.
How does G# Diminished differ from G# Minor?
G# Minor has a perfect fifth. G# Diminished lowers the fifth by one semitone to D (diminished fifth). That extra compression creates intense harmonic tension — the tritone between root and diminished fifth is the most dissonant interval in Western music.
What is the symbol for the G# Diminished?
G# Diminished is written as G#dim or G#°. The ° or "dim" symbol means both the third and fifth are minor/diminished. Do not confuse with G#dim7 or G#ø (half-diminished), which include additional notes.
What are the inversions of G# Diminished?
First inversion (G# Diminished/B): B–D–G#. Second inversion (G# Diminished/D): D–G#–B. Diminished triads are used in classical music as the vii° chord — the chord one semitone below the tonic, with strong resolution pull.
How is G# Diminished used in music?
G# Diminished most commonly functions as the vii° chord in a major key, creating strong resolution back to the tonic. It also works as a chromatic passing chord between two nearby chords, and in classical music as a brief point of dissonance. Jazz uses the full four-note dim7 more often than the triad.
What songs use diminished chords?
Michelle (Beatles) uses a diminished chord as a chromatic passing chord. Many classical pieces use vii°–I cadences. Jazz standards use dim7 chords as chromatic passing and approach chords. Diminished harmony also appears in flamenco and film music for dramatic tension.