C♯m11
C# Minor 11th — the full minor stack through the eleventh — voiced in fourths it becomes the modern quartal sound.
The keys
C♯ – E – G♯ – B – D♯ – F♯
What's inside C♯m11
| Note | Interval from root | Degree |
|---|---|---|
| C♯ | Root | 1 |
| E | Minor 3rd | b3 |
| G♯ | Perfect 5th | 5 |
| B | Minor 7th | b7 |
| D♯ | Major 9th | 9 |
| F♯ | Perfect 11th | 11 |
A working voicing
Split the chord between two hands the way working players do — a solid shell low down, the colour tones up top:
| Hand | Keys |
|---|---|
| Left (shell) | D♭2 – B2 |
| Right (colour) | E4 – E♭5 – G♭5 |
Where C♯m11 lives
As the i chord
C♯m11 → A → B → C♯m11
The minor home base: i–VI–VII pulls away and lands back home.
In a ii–V–i
E♭m7♭5 → A♭7 → C♯m11
The minor two-five resolving into this chord as the destination.
Put C♯m11 under your fingers
Hear every voicing, see the keys light up, and drill it in the interactive Chord & Voicing Lab.
Open the Chord & Voicing Lab →