The Audio Return Channel (ARC) is a feature found in HDMI connections that allows audio to be sent back from a TV to an audio device, such as a soundbar or AV receiver. This simplifies the setup by eliminating the need for a separate audio cable, enabling users to enjoy high-quality sound from their TV shows and movies. With ARC, users can control the audio device using their TV remote, making it more convenient to switch between different audio sources. This feature is particularly useful for smart TVs that stream content, as it allows the audio from apps to be played through external speakers without additional wiring.