Chord · 11ths
C♯m7♭5/11 — C♯ Half-Diminished / 11th
C♯m7♭5/11 is the C♯ half-diminished / 11th chord. It is built on the root C♯ with minor 3rd (E), diminished 5th (G), minor 7th (B) and perfect 11th (F♯) above it — the formula 1 ♭3 ♭5 ♭7 11, sounding the notes C♯ E G B F♯. On the piano it sits at C# (octave 4) and above in the library's voicing; the same 5 notes in any octave are still C♯m7♭5/11.
- Root
- C♯
- Quality
- Half-Diminished / 11th
- Formula
- 1 ♭3 ♭5 ♭7 11
- Notes
- C♯ E G B F♯
On the keyboard
The notes of C♯m7♭5/11
| Degree | Note | Interval from the root | Pitch |
|---|---|---|---|
| 1 | C♯ | root | C♯4 |
| ♭3 | E | minor 3rd | E4 |
| ♭5 | G | diminished 5th | G4 |
| ♭7 | B | minor 7th | B4 |
| 11 | F♯ | perfect 11th | F♯5 |
Other 11ths on C♯
Half-Diminished / 11th chords on every root
Part of the chord reference. See also the scales and the keys.