[Creeker]

If your TV and receiver both are ARC capable, a single HDMI cable is all thats needed.
With TV on and connected by HDMI cable simply scroll through the inputs of your receiver/stereo to find ARC. Some may also have a separate button labeled ARC or a button on the remote labeled ARC. You do not need to do anything to the TV just have it on a channel with sound like normal.

After you get the input to ARC on the receiver, it may take a few seconds for it to recognize the TV's output. Our home system is instant but I've noticed the Furrion system in the Montana has a few seconds delay.

Its extremely simple if both units are ARC capable. ( ARC = Audio Return Channel)