I see you replied there so my advice is to do the same research as I did and read my comment about ARC.
Again, if you feel ARC should work, talk to the makers. In reality, it doesn't always work.
I have recently bought Yamaha home theatre system, Receiver RXV683. and Samsung series 6 TV. I have got HDMI cable running from HDMI ARC(Receiver) to Samsung TV HDMI ARC port. I have got audio1 as input in yamaha receiver. and I have tried by all inputs as well.
Sound doesn't come when I watch normal TV channels.
Enter to win* a free holiday tech gift!
CNET's giving five lucky winners the gift of their choice valued up to $250!