eARC (Enhanced Audio Return Channel)
Video & DisplayHDMI 2.1 feature enabling high-bitrate audio from TV to soundbar over the same HDMI cable.
eARC supports lossless Dolby TrueHD, DTS-HD Master Audio, and Dolby Atmos over HDMI, replacing the limited bandwidth of the original ARC. Only requires one HDMI cable between TV and soundbar, eliminating the need for optical TOSLINK.