QUOTE(jackmok5489 @ Oct 22 2015, 08:52 PM)
Its vcd version.. may is tat any solution?
you are getting things messed up, i googled your EMX200 and its a mixer, looking at your picture thats not a mixer
i did manage to find video showing what you have, but that has no input pictures so what input you are using to your amp?
also knowing vcd players unless it has an optical in (which im almost certain you are not using) its not a 5.1, and its even more unlikely you have usb to it
this comes to my next suspicion when you mention the motherboard, motherboards with built in opticals are very very rare, hence my suspicion is that you are using the 3.5 jack out, from your motherboard to one input (normally mic) into your amp.
which comes to the next problem, why you cant seem to fit 3 RCA's, in a 5.1 system you dont need 3 RCA's you need 1 optical. having 3 RCA's means something is wrong somewhere as RCA's are stereo.
tldr, you dont have 5.1, get a proper decoder or forget about it