[Asio.Input.0]
Driver=Yamaha Steinberg USB ASIO
Channel=0
The guitar plugs into the first input.
I have not tested the rest of the inputs, but I suppose they work the same way with the following logic:
Channel = 0 - first input
Channel = 1 - second input
Channel = 2 - third input
Channel = 3 - fourth input
Thank you so much for RS ASIO!