Audio Out of Sync: Why It Happens and How to Fix It

First, work out whether it drifts or is constant

A constant offset — audio always about a quarter-second behind, from the moment playback starts — is a processing delay in your equipment. A drift that starts fine and grows worse over minutes is a different problem, usually a clock mismatch in the player or a struggling decoder.

The distinction takes ten seconds to establish and rules out half the possible causes. Watch the first thirty seconds, then check again after five minutes.

Constant offset: it is your audio path

Televisions apply picture processing that delays the image by tens of milliseconds. Soundbars and receivers apply their own processing to the sound. When the two do not agree, you get a permanent offset that has nothing to do with the stream — and it will be present on broadcast television too, which is the easiest way to confirm it.

Bluetooth headphones and speakers are the worst offenders, routinely adding 100 to 300 milliseconds. There is no fix for that beyond using a wired connection or a player with a manual audio-delay setting.

• Turn off the television's picture-enhancement and motion-smoothing modes.
• Set the television to Game or PC mode, which bypasses most processing.
• Check your soundbar or receiver for a lip-sync or audio-delay adjustment.
• Test the same content through the television's own speakers to isolate the audio equipment.

Growing drift: it is the player or the decoder

Audio that starts aligned and progressively separates points at the client. The usual causes are a player struggling to keep up in software decoding, or an audio track whose sample rate the device is resampling badly.

Try the same channel in a different player on the same device. If the second player holds sync, the first one was the problem — and this is one of the more common reasons people end up switching players on cheaper hardware.

The fix that works most often

Pause and resume. It sounds trivial, but it forces most players to resynchronise the audio and video clocks, and it resolves a drift immediately in a large share of cases. Changing channel and coming back does the same thing.

If it recurs within minutes every time, stop treating it as a glitch and look at the decoder setting — switching between hardware and software decoding in the player's settings resolves most of the rest.

Questions

Is it the service's fault?

Occasionally a specific channel has a genuine encoding problem, but if the offset appears across multiple channels it is your equipment. Test one channel on a second device before reporting it — if only one device is affected, the stream is fine.

Why do my Bluetooth headphones make it worse?

Bluetooth introduces latency by design, typically 100 to 300 milliseconds depending on the codec. Some players have an audio-delay setting you can use to compensate; otherwise a wired connection is the only real fix.