Amazon Fire TV Stick Audio Out of Sync? Here’s How to Fix It

Basic Fixes

• Check Bluetooth device battery levels: In addition to battery levels, you should also check if you have low-latency Bluetooth earphones. Trying out a wired headset while watching on a Desktop or TV can fix the issue.
• Check Internet speed: This is recommended especially while watching content in 4K Ultra HD resolution.
• Force stop and relaunch the streaming app: This will give the app a fresh start on your Firestick.
• Update Fire OS and streaming app version: Installing the latest versions can help you fix the issue.

Fix 1: Turn Off Dolby Digital and Switch to Stereo

Not all content on streaming platforms supports Dolby Digital 5.1 surround sound. You can switch to Stereo which is 2-channel audio.

Step 1: Go to Settings on your Fire TV homepage and select Display and Audio.

Step 2: Select Audio and select Surround Sound.

Step 3: Choose PCM to switch to stereo audio from Dolby Digital.

Fix 2: Check Audio Video Sync Tuning

AV Sync Tuning is a built-in tool for the very purpose of syncing audio and video on your Amazon Fire TV Stick.

Step 1. Go to Settings and select Display and Sounds.

Step 2: Select Audio from the list of options and choose AV Sync Tuning.

You will now see the AV Sync Tuning screen on your TV. To sync audio and video, every bounce of the on-screen ball should happen simultaneously as the circular flash on the top-left side and a click tone.

Step 3: Press the left and right navigation buttons on your remote to use the slider at the bottom.

Move to the right if the click tone occurs before the flash, or to the left if it occurs after the flash.

Step 4: Go to Apply above the slider to save your preferences once audio and video are synced.

Step 5: Go back to the home screen and open your streaming app to check if this fixed the problem.

Fix 3: Reset Fire TV Stick

This will reset all your in-app preferences. But you will also have to re-install your streaming apps.

Step 1: Go to Settings on your Fire TV home screen.

Step 2: Scroll to the right and select My Fire TV.

Step 3: Scroll down and select Reset to Factory Defaults.