Symptoms
- Sound is noticeably behind the video during playback
- One earbud plays audio slightly after the other
- Audio cuts out briefly on one side
- Earbuds work fine with phone but not with computer, or vice versa
Likely causes
- CommonBluetooth codec mismatch or weak connectionLower-quality Bluetooth codecs or a weak signal can introduce noticeable audio delay, especially with video.
- CommonOne earbud lost sync with the otherTrue wireless earbuds relay audio from a primary bud to the secondary one, which can fall out of sync.
- PossibleOutdated Bluetooth drivers on the computerDriver issues can affect how well the connection maintains a stable low-latency stream.
- PossibleFirmware needing an updateManufacturers release firmware updates that address latency and sync bugs.
- Less commonInterference from other wireless devicesCrowded 2.4GHz environments can affect Bluetooth audio streaming.
What to do
- Place both earbuds back in their charging case for about 10 seconds, then take them out and reconnect to reset their internal sync.
- Forget the earbuds in Bluetooth settings and re-pair them fresh with the computer.
- Check for a firmware update through the earbuds' companion app.
- Move closer to the computer and reduce the number of other Bluetooth/Wi-Fi devices active nearby.
- Update the computer's Bluetooth driver.
- Test the earbuds with a phone to see if the delay happens there too, which would point to the earbuds rather than the computer.
- If a specific app (like a video player) always shows delay, check if it has an audio/video sync adjustment setting.
Tools and parts
- None
Replacement wireless earbudsSearch: “true wireless earbuds”
When to call a pro
If delay or sync issues persist across multiple devices after a reset and firmware update, the earbuds' internal wireless chip may be failing.
Safety
Generally low risk
Generally low risk for a careful person. Stop if anything looks different from what this guide describes.