Space plays and stops
- Left hand
- C#3F#3B3
- Right hand
- E4G#4
- Family
- 5-Note Quartal
The So What I voicing of C#m9 stacks C#, F#, B, E and G# from the bottom up: the root, 11th, minor 7th, minor 3rd and 5th of the chord.
It's one of the 5-Note Quartal voicings. The other for C#m9 is So What II.