C# m(maj9) Chord
How the C# m(maj9) chord is built: its notes, its interval structure, and where it fits.
The C# m(maj9) chord contains 5 notes: C# – D# – E – G# – C. It belongs to the ninth & extended 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.