Hi there,
We recommend using HDMI as this will offer the best audio and user experience available. First, connect a HDMI cable from the Soundbar to a TV's ARC HDMI input. Then you will select HDMI as the source using the Soundbar remote using the Source button (which is the upper most right button). From here you will be all set. And can now use the TV remote to control the overall volume of your Soundbar.
~Samsung Solutions