Sync your Audio
on Prime Video
Bluetooth latency makes Prime Video impossible to watch. LagSync fixes the delay at the engine level for perfect lip-sync.
Prime Video streams are often DRM-wrapped and use adaptive bitrate. Buffering can be aggressive.
Last updated: 4/10/2026
Quick Setup Guide
Install & Pin
Add LagSync to your browser and pin it to your toolbar for quick access while watching.
Play Prime Video
Open any video on Prime Video. LagSync will automatically detect the video engine and prepare the hook.
Slide to Sync
Open the popup and move the slider. Your audio will shift in real-time until it fits the video perfectly. You could also use our built in latency tester.
Practical Tips
Prime Video streams are often DRM-wrapped and use adaptive bitrate. Buffering can be aggressive.
- Use a small buffer or the 'instant' preset to keep audio tight (start near 180 ms and fine-tune).
- Enable Audio Mode for dialog-heavy shows and movies.
- After changing extension settings, reload the player to reinitialize the pipeline — DRM players sometimes re-open media sessions on quality switches.
- If you experience drift during long plays, seek a few seconds forward/back to force a resync.
LagSync v1.2.1 — Available Now
LagSync v1.2.1 is available now on Chrome, Firefox, Brave, and Edge. Safari support is coming soon.