It truly is an optional step. When you've got ARC-supported equipment, connect an HDMI cable for the ARC-enabled HDMI port about the Tv set and an ARC-enabled audio unit (soundbar). It sends the audio with the TV to the audio unit to simplify the setup and reduce cable clutter. https://howtogetbachelorcertifica68865.blogdigy.com/the-basic-principles-of-certificate-for-the-degree-of-bachelor-55390279