I have a Creative Inspire T6160 PC speaker system, but in the current setup of my computer, there's hardly any "surround" sound. So I thought os using the speakers with my new TV, an LG 32LS5700. There is a "PC Audio Input" jack in its rear, but I don't know how to connect the 3 jacks of the 5.1 to that single jack. Is there a new cable to be bought? Suggestions?