ah, I see. I think it depends on your surround system's capabilities. For example, the Logitech z680s I use can give standard tv channels' audio (which is usually in stereo) a 5.1 effect with Dolby ProLogic or ProLogic 2, so that 'stereo' sound can imitate '5.1 surround sound'. There may be settings on your surround system that you can play with to incorporate ProLogic into your TV audio.