i bought a surround sound that doesnt have enough hdmi inputs on it to do my...

[DumplingShakes]

...xbox and directv.? i only bought this because the mouthbreather that worked at best buy told me it would let me get surround sound through my xbox and directv. i want to try to make it work without having to buy a whole different one. any ideas. i have hdmi from my directv and xbox to my tv right now and a hdmi cable from the new surrouund to my tv