C# m11 Chord
How the C# m11 chord is built: its notes, its interval structure, and where it fits.
The C# m11 chord contains 6 notes: C# – D# – E – F# – G# – B. It belongs to the eleventh family of chord qualities. Like every chord, it is defined by the distances (intervals) between its notes, not by any one instrument — which is why the same formula names the chord whether it is voiced on a fretboard, a keyboard, or a choir.