Question

how to switching firewire or network connection uc surface

Answer 1

There is no selector or on/off button, so you can't switch from FireWire to network. The only advice is to disconnect your computer from the network and simply run UC Surface through FireWire.

Answer 2

You can do this in capture 2 there is a button to switch the firewire on and of for all the 32 channels at the same time

Answer 3

Yes, correct, that's the "virtual soundcheck mode". But that has nothing to do with network and UC Control. The question is not really clear, it can also refer to the two riders of the same mixer...