I have a gigabyte GA-ma78gm-s2h it has realtek ALC889a HD audio on it. I have connected my dolby 5.1 speakers via the 1/8 inch headphone style cables and in the speaker test they all sound fine although i have to set it to an 8 speaker configuration to get it realize that i have no side speakers, but when I play and music or video file i only get stereo sound. cant seem to figure it out , is there no speaker setting for 5.1?? any help greatly appreciated!