Thank you Tiamat,
I did have optical on my last board I used with these speakers (Abit). This board is a MSI K9N6, and it has SPDIF but not optical and for some reason not digital. But I did try a stereo adapter on the mini plug and a few others that didn"t really fit . The stereo adapter radio shack gave me fit, but no sound, after plugging into every socket on my tower. I asked them if they had something that would pick up the HD from the realtek. They looked at me like was missing some marbles and they were close, I don"t know much about sound.