Can a soundbar cause audio sync problems?

Yes — external audio systems sometimes add their own processing delay, especially with certain sound modes enabled, which can introduce a sync gap that wouldn't exist using the TV's built-in speakers.

Does audio sync relate to buffering or internet speed?

Not directly. Sync issues are a processing mismatch between audio and video streams, while buffering is a playback interruption caused by network conditions — they're separate problems with separate causes.

Troubleshooting

Audio Out of Sync? Causes and How to Fix It

Why audio and video can drift out of sync during streaming, and the most effective fixes to try first.

September 6, 20261 min read

Quick Answer

Audio sync issues usually come from a mismatch in how quickly your device processes audio versus video, often triggered by HDMI handshake issues, app bugs, or an overloaded device. Restarting the app or device resolves most cases; persistent issues are more often specific to one app or one piece of content than a universal problem.

Key Takeaways

Audio sync problems come from a processing mismatch between audio and video, not from your internet connection directly.
Restarting the streaming app or device resolves the majority of sync issues.
HDMI and audio system settings can introduce sync problems independent of the streaming app itself.
If sync issues only affect specific content, the problem is more likely on the source side.
Persistent sync issues across everything you watch point to your device or audio setup, not the content.

Audio drifting out of sync with video is one of the more disorienting streaming problems — here's why it happens and the fixes that actually resolve it most often.

Why Does Audio Go Out of Sync?

Audio and video are processed and transmitted as separate data streams, then recombined for playback. When your device, TV, or audio system takes a different amount of time to process one versus the other, a noticeable gap opens up between what you hear and what you see.

Common Causes

An HDMI handshake issue between your streaming device, TV, and/or external audio system (soundbar or receiver).
A temporary app bug that a restart typically clears.
An overloaded device struggling to process both audio and video smoothly at once.
Audio processing settings on an external sound system introducing extra delay.

How to Fix Audio Sync Issues

Restart the streaming app first — this resolves the majority of temporary sync glitches.
Restart your streaming device and TV if restarting the app alone doesn't help.
Check for an audio delay or sync adjustment setting on your soundbar or AV receiver, if you use one.
Try a different HDMI port or cable if the issue persists across multiple apps.
Lower the video quality setting temporarily if a struggling device seems to be the underlying cause.

Is It the App or the Content?

If sync issues only happen on specific content and everything else plays back normally, the problem is more likely with that specific source rather than your device. If sync drifts across everything you watch regardless of app or content, your device or audio setup is the more likely cause.

Frequently Asked Questions

Many sync issues stem from a temporary processing glitch that clears itself once the app reloads and re-establishes its connection to your device's audio and video output.

Troubleshooting