Originally Posted by Possumgirl
ARC outputs the same audio that you'd get via optical or coax. With most HDTVs that's 2 ch. for attached source devices.
For the internal tuner it's 5.1 when that is being broadcast. For the smart apps I think the audio depends on both the app and the TV.
Please help clarify this for me so I don't misinform people here. ARC to me seems to be more of a convenience, especially when your sound bar might only have 1 HDMI input while the TV might have more. With ARC, you can keep all of your sources connected to your TV via HDMI and then connect the TV to the sound bar with 1 HDMI cable. That convenience could come at the price of diminished sound quality, though. Whenever possible, connecting the sources directly to the sound bar will produce the best sound.
Back to the OP, I wouldn't use the ARC connection with his setup as his sound bar has 3 HDMI inputs. At least that's the way that I understand it.Edited by Doctego - 12/28/12 at 6:41pm