2. Coaxial digital output of your soundcard > coaxial cable > COAXIAL digital input of the Zero
There is no other way to connect the Zero to your soundcard.
The Line OUT connectors of the Zero are analog outputs of the Zero for some external amplifier.
By the way Seaice im leaving in Czech Republic, maybe you can tell me from where i can buy this kind of cable online, i dont know czech language so if you can help me please do it.
I need one this i think but i cant find it: http://img398.imageshack.us/img398/1142/img1853ej0.jpg