Hey guys. I recently wanted to set up my home theater speakers to my PC.i am running windows 10 and I have a 5.1 system. I went out and bought a optical cable to connect from my motherboard (Asus Z-87 Pro) to my older Sherwood RD-8601 reciever. I downloaded Realtek and i believe i have version R2.79 but now none of my speakers are working. I have the volume all the way up in realtek and I started running Ark to see if any sound would pump out but there was no sound at all. Im not sure what i did wrong but i just want my surround sound to work! Thanks for all the help in advance!