My PC sound card is an ASUS Xonar DGX PCI-E GX2.5 (https://www.amazon.com/gp/product/B007TMZ1BK/ref=oh_aui_search_detailpage?ie=UTF8&psc=1). My sound bar is a Vizio 5.1 (https://www.walmart.com/ip/VIZIO-32-5-1-Soundbar-System-SB3251n-E0/817243109). The sound bar takes as possible 5.1 inputs only...