Hello all, Sorry for the late response and thank you for all your help.
All tracks are playing but when I freeze ANY track that is when it crackles and pops.
I dont think the crackling has anything to do with on/off midi notes as you explained because all the midi data is actually playing fine.
My interface is a Line six ux2, WDM/KS is my driver mode, and my buffer is set in the middle.