LG webOS TV User Manual

HDMI port is not synchronized, set it to PCM.
LG Sound Sync
Sound Additional Settings LG Sound Sync
Connect the LG Sound Sync device to the optical digital input port and set Sound Out
to Optical.
By setting this feature to On, you can adjust the volume of the connected LG Sound
Sync device using a TV remote control.
If the auto-power feature of the sound bar that supports LG Sound Sync is set to On, the
sound bar will be turned on or off together when the TV is turned on or off.
Setting Digital Sound Out
Sound Additional Settings Digital Sound Out
You can configure the Digital Sound Out settings.
This setting is only available when Sound Sound Out is set to Optical/HDMI
ARC.
When Pass Through is enabled, sound effects may not be output.
The codec output with a device may differ from input signals.
Sound Input Digital Sound Output
PCM
All PCM
Auto / Pass Through
MPEG PCM
Dolby Digital Dolby Digital
Dolby Digital Plus /
Atmos
(Optical) Dolby Digital
(HDMI ARC) Dolby Digital Plus /
Atmos
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LG webOS TV Specifications

General

Operating System	webOS
App Store	LG Content Store
Voice Assistant	Google Assistant, Amazon Alexa
Smart Remote	Yes (Magic Remote)
Screen Share	Miracast
RAM	Varies by model
Storage	Varies by model
Supported Resolutions	4K UHD (3840 x 2160), 8K UHD (7680 x 4320)
HDR Support	Dolby Vision, HDR10, HLG
Connectivity	Wi-Fi, Ethernet, Bluetooth
Ports	HDMI, USB, Optical Audio Out, Ethernet
Voice Control	Yes (via Magic Remote or compatible devices)