LG 60LA620S.AEE User Manual page 56

To synchronize audio and video
❐
SMART ➾
Synchronizes video and audio directly when they do not match.
If you set AV Sync. Adjust
speakers or SPDIF) to the screen image.
TV Speaker
Settings ➙ SOUND
to ON,
[Depending on model]
Adjusts the synchronization of the sound from the TV's internal
speakers.
The "-" button makes the sound output faster and the "+"
button slower than the default value.
➙ AV Sync. Adjust
you can adjust the sound output (TV