Thanks - when you say external sources what exactly do you mean? Down converting to 2 channel is fine for my needs since I'm piping it to an older stereo system.
My TV is connected to Satellite box, Asus media player, blu ray and wii U, which I'm assuming are all "external"? Also assuming the media player & DLNA player, youtube etc. would all be internal?
Ended up ordering this converter, hopefully will work but if it doesn't I'm only out $20 & change..