This article is part of our guide IPTV Not Working? A Step-by-Step Troubleshooting Guide.
When audio is out of sync with the picture, voices stop matching lips and even a good programme becomes hard to watch. The stream is rarely the cause. More often the delay comes from Bluetooth headphones, a soundbar or AV receiver, or the TV's own picture processing — and each of these can be fixed.
Step 1: Find out where the delay comes from
- Does it happen on every channel? If yes, the cause is probably your setup. If only one channel, the stream itself may be out of sync.
- Does it happen with the TV speakers? If the problem disappears when you switch to the TV's built-in speakers, the soundbar, receiver or headphones are adding the delay.
- Does it happen in another player or on another device? That separates player issues from audio hardware issues.
Step 2: Fix Bluetooth delay
Bluetooth headphones and speakers add latency because audio is compressed and buffered before transmission. The amount varies between devices.
- Try the TV speakers or wired headphones to confirm Bluetooth is the cause.
- Keep the Bluetooth device close to the TV or streaming device.
- Use your player's audio delay setting to compensate (see step 4).
- Some devices and headphones support lower-latency modes; check their settings.
Step 3: Check TV, soundbar and receiver settings
When audio passes through a soundbar or receiver, the TV and the audio device both process the signal.
- Look for Lip Sync, AV Sync or Audio Delay settings on the TV, soundbar or receiver, and adjust them.
- If your TV has Game Mode, test with it on: it reduces picture processing, which can change the sync.
- Try switching the TV's digital audio output format (for example between Auto, PCM and Bitstream/Passthrough) to see if the sync improves.
- Make sure the soundbar is connected to the TV's HDMI ARC or eARC port if you use HDMI audio.
Step 4: Adjust sync in the player
Many players let you shift audio earlier or later:
- Look for Audio delay, Audio offset or Sync in the player's playback options.
- In VLC, press J or K during playback to shift audio by 50 ms steps, or use Tools → Track Synchronization on a computer. See VLC settings for streaming.
Adjust in small steps and test with a close-up of someone speaking.
Step 5: Try another audio track
Some streams offer more than one audio track, such as stereo and surround versions. Switching tracks can resolve sync issues caused by a particular format. See subtitles and audio tracks for how to switch.
Step 6: Restart and update
- Restart the player, the streaming device and the audio equipment.
- Update the player, device software and, if possible, soundbar firmware.
Quick reference
| Cause | Typical sign | Fix |
|---|---|---|
| Bluetooth latency | Only with wireless headphones or speakers | Player audio delay, low-latency mode |
| Soundbar or receiver processing | Fine with TV speakers | Lip-sync setting on TV or soundbar |
| TV picture processing | Changes with picture mode | Try Game Mode, adjust AV sync |
| Audio format | Changes with PCM vs. passthrough | Switch audio output format |
| The stream itself | One channel only | Try later or another track |
Frequently asked questions
Why is audio ahead of the video?
Heavy picture processing on the TV can delay the image while sound plays straight away. Try Game Mode or a picture mode with less processing, or delay the audio in the player.
Can I fix Bluetooth delay completely?
Often not completely, but a player audio delay setting can compensate. Wired headphones or TV speakers avoid it entirely.
Why is only one channel out of sync?
The stream itself may be out of sync. Try another audio track or come back later; report persistent issues to support.
Lip-sync fixes at a glance
Check whether the delay comes from Bluetooth, a soundbar, TV processing or the stream, then use the matching fix — lip-sync settings, audio format, player audio delay or another track. For other playback problems, return to the IPTV troubleshooting guide.