HDMI ARC stands for Audio Return Channel , a feature introduced in HDMI version 1.4 that allows audio signals to travel both ways along a single HDMI cable between a TV and an audio device like a soundbar or AV receiver
. Normally, HDMI cables send audio and video from a source (like a Blu-ray player) to a TV, but ARC enables the TV to send audio back to the audio system without needing a separate audio cable
. This simplifies connections by reducing the number of cables required. For example, instead of needing an optical audio cable in addition to HDMI cables, ARC lets the HDMI cable connected between the TV and soundbar carry audio in both directions
. This is especially useful if you want to use the TV’s built-in apps or tuner and send that audio to an external sound system. There is also an enhanced version called eARC (Enhanced Audio Return Channel) , introduced with HDMI 2.1, which offers much higher bandwidth and supports advanced audio formats like uncompressed Dolby TrueHD, DTS-HD Master Audio, and object-based audio such as Dolby Atmos and DTS:X
. eARC improves audio quality and compatibility compared to ARC, enabling richer surround sound experiences.
Summary:
- HDMI ARC allows audio to be sent both ways over one HDMI cable between TV and audio device, eliminating extra cables
- It supports standard audio formats and simplifies home theater setups.
- HDMI eARC is a newer, higher-bandwidth version that supports lossless, high-quality audio formats and immersive sound like Dolby Atmos
In short, HDMI ARC is a convenient feature that reduces cable clutter and improves audio connectivity between your TV and sound system. eARC is the advanced version for higher fidelity audio.
