@leswilson
The ‘Source’ screen, opened with the ‘Fn’ key from the Processing Preamp screen is global.
It will automatically select the channel you are currently viewing, but you can then select multiple/all/no channels and switch channel source between Local/dSnake/USB, you can also switch the global USB input between Qu-Drive and USB-B.
As @garyh says, Local input sockets (and USB input sockets) are hardwired 1-to-1 with input channels, but yes, when using dSnake, you can patch any available socket to any input channel (and double patch if required) in a two step process:
First patch the dSnake input sockets to channels in the ‘Setup > I/O Patch > dSnake In’ – this is selecting which dSnake socket that input channel will use when sourced from dSnake.
Then switch all the input channels which you want to be sourced from dSnake in the Source screen.
Thanks,
Keith.