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How to Fix Audio Sync on a LG Smart TV

Authored by:
Support.com Tech Pro Team
This Guided Path® was written and reviewed by Support.com’s Tech Pro team. With decades of experience, our Tech Pros are passionate about making technology work for you. We love feedback! Let us know what you think about this Guided Path by rating it at the end.

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

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

LG TVs with webOS

  1. Push the Home button on your remote.
    Remote with Home button highlighted.
  2. Select the Settings gear icon in the top-right corner.
    Home menu overlay inset with settings highlighted.
  3. Select Sound > AV Sync Adjustment.
    Sound menu with AV Sync highlighted.
  4. Turn On AV Sync Adjustment, then use the left-right slider to delay or speed up the audio to match the video better.
    AV Sync Adjustment with enable toggle and adjustment slider highlighted.

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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.

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

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

LG TVs with webOS

  1. Push the Home button on your remote.
    Remote with Home button highlighted.
  2. Select the Settings gear icon in the top-right corner.
    Home menu overlay inset with settings highlighted.
  3. Select Sound > AV Sync Adjustment.
    Sound menu with AV Sync highlighted.
  4. Turn On AV Sync Adjustment, then use the left-right slider to delay or speed up the audio to match the video better.
    AV Sync Adjustment with enable toggle and adjustment slider highlighted.