Advice on setting up sound bar?

[onyx39]

So, just bought a new sound bar,quick question about setting it up.
I have one audio input on the back, and one audio output on the tv.
Question is, currently. I have an output coming from the back of the sky box into the sound bar, which works fine.
Only problem is, content from my media server, played via the smart tv, does not get to use the soundboard.
Should I be taking the output from the tv into the sound bar, or will that only work for signals from the tv (and not the connected devices?)

[The_Burg]

Take the output from the TV. That way everything I'll come through it.