Do You Need HDMI eARC For Dolby Atmos? –

One of the main benefits of using HDMI eARC for Dolby Atmos lies in its name. HDMI eARC allows for a more enhanced audio quality to be transmitted. Dolby Atmos technology uses object-based sound, which means that individual sounds are treated as separate objects, rather than being part of a fixed channel.
HDMI eARC and Dolby Atmos are two technologies that have become popular in recent years. They're designed to create home theater experiences that rival cinema experiences.

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