I just bought an Asus M5A97 R2.0 motherboard. This motherboard has a Realtek 887 8-channel high-definition (Azalia) audio device. It has two "SPDIF" outputs, one in the form of an optical S/PDIF port, labeled "SPDIF_O2", and one in the form of a header, labeled "SPDIF_OUT". (The SPDIF_OUT header...