To be clear, this is by no means universal with ARC. ![]() It’s become infamous over the years for causing sound to become dislocated from the pictures with some AV setups, so that actors’ lips move out of sync with the words you’re hearing them say. In reality, though, ARC isn’t always the blessing it sounds. After all, it lets TVs that support ARC send their sound out via ARC-certified HDMI connections to external devices such as soundbars and AV receivers, reducing cabling headaches and essentially turning your TV into a convenient audio ‘switching device’. On paper, the audio return channel (ARC) technology that’s part of the HDMI connection specification is a fantastic idea. A lot of higher-end soundbars have this built in, and Sonos soundbars can do this through the Sonos app, though only if you have an iPhone, sadly. ![]() In a perfect world your soundbar will have an auto-calibration system, where mics in the main soundbar or remote control listen to test signals and automatically adjust the soundbar’s output accordingly.
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