I have 49 inch Sony tv with two ways to connect external speakers(3.5 audio jack and optical). I want to connect Logitech Z5500 5.1 to this TV and get surround sound. Speakers are modified, the controller for logitech speakers is dead so i made it work without original controller (VGA cable is on one side connected to subwoofer and on the other side are 3 jacks 3.5mm. I also have external Sound Blaster X-Fi Surround 5.1 Pro sound card. Is there any way connect tv and this 5.1? I only mentioned sound card because it might be of help. Any thoughts would be appreciated.