The Advanced Audio Return Channel, or eARC for short, is the next generation ARC implemented in the HDMI 2.1 specification.<br><br>eARC's main advantage over ARC is the widespread increase in bandwidth and speed. This makes it possible to send much more complex audio signals from the TV to the audio tape or AV receiver, since there is practically no need for compression anymore.<br> < br>eARC specification allows up to 32 audio channels, including 24-bit/192 kHz data streams uncompressed up to a maximum of 38 Mbps.<br><br>This bandwidth theoretically allows all current audio formats such as Dolby TrueHD, DTS-HD Master Audio, and even object-based formats such as Dolby Atmos and DTS:X to be transmitted through the eARC channel without compression.<br><br>In addition, the use of HDMI eARC should make the handshake between compatible devices much smoother and address the need for HDMI-CEC activation. The eARC standard specifies a separate data channel that allows data exchange and information control between connected devices.