I have a setup in my house where I have 1 surround sound in a room with 4 things connected to it w/ optical audio and 1 with the standard red/white cables. What I want to do is be able to do is listen to all inputs at the same time (or just 1, so N inputs at the same time), and ideally control the volume for each input.
So for example if I'm playing madden and additionally want to hear music from my computer, I want to be able to select those 2 inputs and have both playing over the surround sound.
Is there some way that I can achieve this? Would it require an external mixer, or is there some other method?