There is a lot of noise at the beginning of the clip, before you play. Do you have a humbucking pickup guitar? Do you hear the same noise with it?
Do you have the same noise when you connect your KPA directly to the interface(with no mixer?) When you connect directly to the DXR10?
I bypassed everything through my testing before.
I just tried bypassing the mixer straight into the DXR 10s. Disconnected pedals. Guitar straight into KPA.
Yes it still has the background noise with Strat, Tele and Schecter with Humbuckers.
Most rigs that I use don't have that much noise. Although there does seem to be a bit of noise in rigs I generally use regularly that I don't recall hearing.