LG 55LW9800 Owner's Manual page 94

Setting
Optimizes the sound depending on the environment in which the TV is installed.
Sound Optimizer
Option
Normal
Wall Mount Type
Stand Type
TV Speaker Turns on the internal speaker of the TV when using an external Hi-Fi system. You can use the
TV speaker as an audio output device even if there is no video input.
When using an external audio device with the ARC (Audio Return Channel) feature, optical
ARC Mode
(Audio Return SPDIF can be output using only a High Speed HDMI cable without an additional optical cable.
Channel)
Option
On
Off
AV Sync. If the video and sound are not synced, you can adjust it manually.
» (-) setting : Make audio output faster than the default.
» (+) setting : Make audio output slower than the default.
Option
AV Sync.
TV Speaker
SPDIF (Sony Philips
Digital InterFace)
Normal sound mode.
Optimized sound mode for a wall-mounted TV.
Optimized sound mode for a stand-type TV.
Some HDMI cables may not support this mode (A High Speed HDMI cable is
recommended).
The ARC mode only works on the HDMI 1 input on the TV.
Activates the SIMPLINK feature to use this feature.
If the device with the ARC feature is turned on, the device speaker is
automatically used when SIMPLINK is enabled.
Even if the device with the ARC feature is turned on and SIMPLINK is
enabled, the device speaker is not automatically used.
Adjusts the sync of the TV speaker and SPDIF.
Adjusts the sync of the sound from the TV s internal speaker.
Adjusts the sync of the sound from an external speaker connected to
the digital audio output port.
Description