I am having trouble getting sound to work on my pc and when I go into my sound options under the control panel the sound device that is enabled is a HD s/pdif with a rear optical jack that it is outputting through. the problem is my onboard sound card does not have an optical jack. it just has the 3 normal jacks. How do i get the sound to work properly. i look in my bios for what type of drivers to search for but it just lists it as HD audio. I know the motherboard is an Asus but beyond that i don't know.