Hi, I've noticed a couple of things when using my DDJ-SP1 and DJM450 together.
I've got the DVS set up and working in all modes and everything apart from quantize in rel mode which seems to be random if it works or not.
When using rel mode the censor or slip reverse button on the SP1 doesn't work. If you power the mixer on before or at the same time as the SP1 you can't assign the the FX's to deck 2, FX2 is greyed out and the button on the SP1 does nothing. I got around the FX thing by assigning it before I turn the mixer on.
Are there any settings I should try changing to help with these things?