Hi, I have a new smart TV, all my devices (SKY, PS3 & Media player) all connect to my AMP over HDMI. My amp outputs audio to my 5.1 speakers and outputs the video to my TV. I switch between AV channels on my AMP depending on which device I'm using - a very simple setup really. My new smart TV has created a problem though. I need to be able to output the audio from my TV when using the smart TV functions. I need to able to output it through to my AMP to get the best possible sound. The two options are: 1, Optical out from my TV to my amp (easy to setup but limits me to 5.1 Dolby D). 2, Setup ARC to output TV audio to my AMP through the same cable my AMP uses to send Video to my TV? The only issue is I don't understand ARC, how it is setup or what it is capable of. I have a Marantz NR1402 Amp. To set it up do I enable HDMI ARC output on my TV, ensure the HDMI is in the ARC HDMI port, then enable ARC on my Amp? What advantages/disadvantages would I get by using ARC? Would I be able to pass through DTS-HD to my AMP through ARC? (I understand LGs 2013 TVs can pass through DTS-HD). Thanks, 2scoops.