I have a 5.1 Logitech pc speaker system and a 42" Samsung LCD 1080p and was wondering if I can use the pc speakers as an external speaker. There's an option in the menu that lets me choose between tv speaker and external speaker. The only problem is I'm not sure which port is the audio output. The only output that I can see is digital audio out optical. The speaker cables are the standard 1/8" computer sound card size. Is there some kind of adapter or connector that I can plug the speaker cables into and then connect to tv?