LG 37LS575S.ABG User Manual page 57

Bypass
To use ARC mode
❐
HOME ➾ Settings
External audio devices can be connected via High-Speed HDMIⓇ cable without
an extra optical audio cable to output SPDIF. It interfaces with SIMPLINK.
For an external device that supports ARC (Audio Return Channel), connect it to
the HDMI(ARC)
Outputs broadcasting signals or the audio of an external
device without audio delay. Audio may be output before video
as it takes time to process video input into the TV.
➙ SOUND
port.
➙ Sound Setting ➙ ARC Mode