VOLUMIO + XONAR DX

Goodmorning everyone,
as you can see I’m new and very inexperienced in this hi fi world.
I wanted to know if I use the software on a machine equipped with a pci card, the xonard dx, I need to install specific drivers and if there are particular settings.
Finally, can I not risk digitae the @? I tried alt gr + ò and alt + alt gr + ò but in vain.

Forgive my poor English.

A greeting!