Not all HDMI is created equal. HDMI ports with Audio Return channel, or ARC, let the audio from your entertainment go to AND from the TV. Let me explain: With ARC, audio and video from, for example, a home theater system with Blu-ray, are delivered to the TV over the HDMI cable, pretty simple. But now, in the age of Smart TV, your television is the source, and if you want to send the audio from streaming movies and YouTube videos out of the TV, to the home theater system for a premium sound experience, ARC makes it neat and easy, all over the same cable! Watch here to get all the details!