I have just bought a Yamaha sound bar and Samsung smart TV but cannot get my old DVD player sound to come through the soundbar

[Lenny11]

I have a Samsung smart TV and Yamaha soundbar. My DVD player is a Sony and can't seem to get any sound . The pictures come through ok and it's driving me insane having tried all combinations of wires!!! Please help

 

[hang-the-9]

How is everything connected?