Chord
G♯dim7 is a diminished seventh chord with the notes G♯, B, D, F. Also written G♯°7. The same chord spelled from A♭ is A♭dim7.
| Note | Interval | Semitones |
|---|---|---|
| G♯ | root | 0 |
| B | minor 3rd | 3 |
| D | diminished 5th | 6 |
| F | diminished 7th | 9 |
| Root position | G♯ – B – D – F | |
| 1st inversion | B – D – F – G♯ (G♯dim7/B) | |
| 2nd inversion | D – F – G♯ – B (G♯dim7/D) | |
| 3rd inversion | F – G♯ – B – D (G♯dim7/F) |
A diminished seventh chord stacks three minor 3rds. It divides the octave into four equal parts, so the same four notes form diminished chords on four different roots; it often replaces a dominant chord.
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