How to Fix Audio Sync on a LG Smart TV

Introduction

When using an external audio device, such as a home theater system or soundbar, the audio playing can become out-of-sync, creating a distracting effect.

This guide will attempt to help you fix this issue.

LG Logo.

1 Adjust Audio Sync

LG TVs can come equipped with one of two versions of operating software. They are commonly referred to as Netcast and webOS. webOS is on most smart televisions made after 2014, while Netcast is more common on older smart televisions and non-smart televisions.
Both versions of the software are covered here. You should be able to identify whether your TV has Netcast or webOS based on the screenshots provided.

LG TVs with Netcast

Push the Home button on your remote.
Select Settings > Sound.
Select AV Sync Adjust.
Select On.
Adjust the External Speaker slider to the left or right, to help better sync up the audio to the video you are watching.

LG TVs with webOS

Push the Home button on your remote.
Select the Settings gear icon in the top-right corner.
Select Sound > AV Sync Adjustment.
Turn On AV Sync Adjustment, then use the left-right slider to delay or speed up the audio to match the video better.