LG S78S2-S Owner's Manual page 38

c Press the Function
d When the external device is properly connected to the product, you can listen to the sound of the device.
When playing the video with Dolby Atmos® or DTS:X® technology, either "DOLBY ATMOS" or "DTS:X" will
appear on the status display.
Note
• Dolby Atmos® or DTS:X® audio supports 3.1.3 channels. When the wireless rear speakers are connected, 5.1.3
channels are supported.
• Please check the audio output settings in the Settings menu of your external device (ex. Blu-ray player or TV).
The audio output should be set to [No encoding], [Bitstream], [Auto], or [Pass through]. For more information
on how to set the output, please refer to your external device' s user manual.
• Use a certified cable with the HDMI logo.
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button repeatedly until "HDMI" appears on the status display.