F♯ / G♭ Half-Diminished 7th
F#m7♭5
Minor 7th with a flat 5. Used in jazz ii-V-I in minor keys.
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Piano Keyboard
Guitar Fretboard
Intervals
| Interval | Semitones | Note |
|---|---|---|
| R | 0 | F♯ / G♭ |
| m3 | 3 | A |
| TT | 6 | C |
| m7 | 10 | E |
F#m7♭5
Minor 7th with a flat 5. Used in jazz ii-V-I in minor keys.
| Interval | Semitones | Note |
|---|---|---|
| R | 0 | F♯ / G♭ |
| m3 | 3 | A |
| TT | 6 | C |
| m7 | 10 | E |