The Default sound device is Speakers, which I assume is them, but I tried HDMI(my monitor's built in speakers), SPDIF Interface(TX0), and SPDIF Interface (TX1), but none of them play besides my monitors. They all show the volume is moving on the green bar.

I have two sound cards listed under my Sound and Game controllers. One is VIA and the other is ATI HD audio. They are both up to date, but could me having two be the problem?