By Akash Sharma A character closes their mouth, but the dialogue continues for another second. During a cricket match, the bat hits the ball before the sound reaches your ears. This delay between picture and audio can make even an expensive smart TV frustrating to watch.
The fault is not always inside the television. Streaming apps, set-top boxes, soundbars, Bluetooth speakers, HDMI connections and heavy picture processing can all create delays. The quickest solution is to identify where the problem starts instead of changing every setting at once.
Test More Than One Channel or App
Check whether the delay appears everywhere. Play a video through a built-in app such as YouTube, then try live television and another streaming service. If only one channel, programme or app is affected, the original content or service may be responsible.
When every source is out of sync, disconnect the soundbar, home-theatre system, Bluetooth headphones and external streaming device. Test the internal TV speakers. If the sound becomes normal, an external connection is probably introducing the delay.
Restart the Complete Entertainment Setup
A temporary processing error can develop when the TV, soundbar or set-top box remains in standby for several days. Switch off every connected device and unplug it for about one minute.
Reconnect the television first and let it start fully. Add the set-top box, console, streaming stick and sound system one at a time. Restart the Wi-Fi router as well when the issue appears mainly in streaming apps.
Adjust the TV’s Audio Sync Setting
Many smart TVs include a control named Audio Delay, AV Sync, Lip Sync, Match Screen and Sound, or Digital Output Audio Delay. It is normally found under Sound, Advanced Settings or Expert Settings.
Make small adjustments while watching a scene with clear speech. If the voice is heard before the lips move, increase the audio delay. If the sound arrives after the mouth movement, reduce the delay where the television permits it.
Some TVs also provide a Bypass or Pass-through setting. This may reduce extra processing and send audio more directly to a compatible soundbar or receiver.
Check the Soundbar and HDMI Connection
A soundbar can add processing time while decoding surround sound or advanced audio formats. Use the soundbar’s own AV Sync control if available.
Confirm that the HDMI cable is connected to ports marked ARC or eARC on both devices. Try another certified high-speed cable if the connection repeatedly loses sync. Update the TV and soundbar software because compatibility improvements may be included.
If the delay continues, temporarily change Digital Audio Output from Auto or Pass-through to PCM. PCM may reduce processing, although it can limit some surround-sound formats.
Understand Bluetooth Audio Delay
Bluetooth speakers and headphones must receive, decode and play wireless audio. This process can create noticeable delay, especially with older devices.
Test the same programme using the TV speakers or a wired HDMI connection. If the problem disappears, Bluetooth is the likely cause. Some televisions do not allow lip-sync adjustment for Bluetooth output, so HDMI ARC or eARC may provide a better movie-watching experience.
Reduce Heavy Picture Processing
Sometimes the audio is not slow—the picture is being delayed by motion smoothing, noise reduction or other image-processing features. Select Standard or Game Mode temporarily and turn off motion enhancement.
Game Mode is useful with consoles because it reduces video processing and input delay. Adjust one setting at a time so you can identify what actually solves the problem.
When Professional Support Is Needed
Arrange professional support when the sound remains out of sync across all apps, inputs and speakers after updates and resets. Seek help sooner if the TV also produces crackling audio, random restarts, HDMI failures or disappearing sound.
Avoid opening the television or soundbar yourself. Internal components can retain electrical charge, and unauthorised work may affect the warranty.
FAQs
Q: Why is only one streaming app out of sync?
A: The app may have corrupted temporary data, an outdated version or a problem with one video. Restart it, update it and test another title before changing TV-wide settings.
Q: Can changing the HDMI cable fix audio delay?
A: It can help when the cable is damaged, unsuitable for the signal or connected incorrectly. Use the ARC or eARC ports with a compatible soundbar.
Q: Why is sound delayed only on Bluetooth headphones?
A: Wireless encoding and decoding take time. Older headphones may have greater latency, and some televisions cannot compensate for Bluetooth delay.
Q: Should I factory reset the TV?
A: Use a factory reset only after testing other sources, restarting devices, adjusting AV Sync and installing updates. It removes accounts, apps and personalised settings.
Nishant Pal