I have a quick question about quartal harmony. Does it still function diatonically or is it a system of it's own?
Quote by Zaphod_Beeblebr
Theory is descriptive, not prescriptive.

Quote by MiKe Hendryckz
theory states 1+1=2 sometimes in music 1+1=3.
Certainly quartal harmony CAN be diatonic, but I imagine it's more common to be chromatic.
Only play what you hear. If you don’t hear anything, don’t play anything.
-Chick Corea