YouTube Audio/Video Sync
Extension Delisted
This extension is no longer available in the official store. Delisted on 2025-09-16.
Extension Actions
CRX ID
mknmhikmjljhpccebpnplhicmcfjkgbk
Status
- Policy Violation
- Removed Long Ago
Description from extension meta
Fix wireless audio streaming delay for YouTube
Image from store
Description from store
There is always a delay when streaming audio from your device to a receiver (Apple TV, AirPlay speakers, Sonos, Network Player, TuneBlade, Bluetooth, etc.). This is not a big issue when streaming music but any video will become out of sync. This Chrome Extension attempts to solve this problem for YouTube.
The extension allows adjusting to a positive delay as well as a negative one making it possible also to correct any YouTube video that has been uploaded out of sync.
One time set up:
- Go to options
- Click on "Find your system's delay"
- A sound will be played, listen and press the button when you hear the last beep
- The approximate delay will be filled in "Global Audio Delay (ms)"
- Play a YouTube video and check if you are satisfied with the sync. If it is not perfectly in sync, repeat the steps above or adjust the delay value manually and save. You can do this from the Options page or directly from the YouTube player
- You can enable/disable the sync adjustment from the YouTube player or by clicking on the extension's icon in the toolbar.
Additional features:
- Auto toggle extension when audio device is connected
- The selectable delay value is limited to 5000ms in either direction but you can change this when you go to More Options: Maximum Selectable Delay (ms)
- If your computer is struggling to sync, you can try adjusting this setting: Maximum Acceptable Lip Sync (ms).
YouTube Audio/Video Sync works by muting the original video and reloading only the audio adjusted to the selected delay.
Note:
-YouTube Live Videos are not supported.
-This extension (at least for now) will only work on youtube.com, embedded YouTube players on other websites will not work.
This is an open source project, licensed under GPLv3
https://github.com/adrian-ilie/av-sync
Latest reviews
- Blu Azure
- I have an old school Home Theater PC with HDMI to TV--> optical out to a Denon receiver. Over just Youtube I get an audio delay which I was unable to get rid of. It was worst in Firefox and a bit better in Edge, but still there. I just found this plug-in for Chrome and it absolutely works, my audio/video are in perfect synch now. The + and - slider makes this a winner.
- Soul S.
- I'm connected to bluetooth speakers with quite the delay, I was scared that the extension only allows audio delay.. but after adding, I found that this extension also allows video delay (meaning - delay in audio) and this was absolutely perform for my case. Thank you for this extension!
- Alan Barker
- This was a fantastic extension, which worked for the most part flawlessly, however very recently - due possibly to updates in Chrome or changes in YouTube - it no longer works. I have tried posting in the support the section, along with many other previously satisfied users, alas the author has not even acknowledged these posts. I was so impressed with the extension that I "bought the author a coffee". However I feel that a one star rating is now justified. This will be changed to a 5 star when the author tries to fix the extension or even says he is aware of the problem and will attempt maintenance in the near future. Thank you so much Adrian, working perfectly again! ❤
- Xavier Boscus
- Génial ! Cette extension refonctionne enfin. Fini les coupures de son. Merci.
- Tatsuya T (Tomkeifer)
- Now it works again.Thanks.
- Göran Helsingborg
- No sound at all when enabling this extension. Same for the Firefox extension 😥
- Vaio San
- Is not working anymore in Google chrome or Brave and app mute the sound. When I disable the app then sound come again.
- Matheus Vinicius Ribeiro Silva
- Doesn't work at all anymore. No audio coming out.
- Anonymous Anonymous
- chrome broke this extension with its updates aka google breaking everything like normal
- b west
- My use case is with a Pair of Devialet Phantom speakers which are paired to my MAC via bluetooth for home theater use. The Devialet speajers already have an inherent delay of around 350ms for a bluetooth connection, on top of additional delay from my MAC to the speakers via bluetooth and youtube. This add-on to Chrome is a FANTASTIC tool to address my specific needs. I was able to configure the exact audio delay to have perfect lip sync when playing youtube videos to my Phantoms. However, it seems the add-on is no longer working. Perhaps due to recent Chrome updates? hen i enable this add-on, no sound is output via bluetooth. So I have to disable the add-on now. I hope the developer can please fix this as this add-on is such a god send for those who need to correct lip sync issues. But even if not, I wish to still thank the developer for doing what they have already done for this issue.
- Wessel Kroos
- Doesn't seem to work anymore
- Juan Miguel Sanchez
- works for youtube and my google home speaker
- Lol Lolol
- WOAH THIS IS SOOOOO GOOD !!!! THANK YOU SO MUCH TO THE CREATOR !!!!! My pc doesnt have bluetooth so I connect my phone to SoundWire and connect my TWS to it, this gave it the problem of latency on YouTube, this fixes it so good it even had automatic finder through click test, its so good !!!!
- no video (Laci)
- Simply works. It works very well and and is very easy to use, tho it does sometimes make the audio cut out here and there. But pausing the video and resuming usually solves that.
- Andrew Wall
- This extension seems very buggy. It sometimes works, but mostly seems not to, meaning that there is no sound at all. I use it for YouTube videos and when it does start working it will work right to the end of the video. I like the settings widget it adds to the YouTube videos, but I've had to disable it as it has annoyed me for the last time.
- Tomasz Żet
- Omg at last! Half a year of torment after buying 9.3 home cinema with Onkyo amplifier no capable of A/V sync bluetooth streaming. Now it's done.
- Gil
- It Works perfectly!!!! It would be great if it could sync other sites like Twitch, Netflix and Prime Videos.
- Vladimir Muzichuk
- Thanks man, this is perfect for the pixel buds pro - the only earbuds that have such a giant delay on windows 10!
- Emiliano Gioia
- Even though the audio cuts briefly whenever you unpause, forward or rewind a video, this extension does the job pretty well. No more lip syncing issues with AAC / SBC headphones!
- Bert
- Thank you so much. Delay on bluetooth ear buds is terrible :(
- guilhaume
- Doesn't work on chromium 108
- Valentin Leung
- Work... when it feels like it... The start of the video is always choppy as it seems to have to calibrate itself. If the sound comes up, then it will work for the entire video, but sometimes, it just stay silent. So.. not sure what is happening.. Because its function is so random, I disabled it. Hopefully an update will make it work flawlessly.
- Naender
- Works very nicely with the delay calibrator! I hope this keeps being updated in the future cause it's really useful for me.
- Loken
- Отличное расширение, наконец можно смотреть видео на ютубе в блютуз наушниках с нормальной синхронизацией звука и видео. Легко настраивается, включается и выключается одним кликом, а можно вообще включить автоматическое включение при подключении блютуз наушников.
- Niccster10
- Works well... when it works. The VAST majority of the time, audio doesn't play at all. When it does, it either just cuts in and out, or it plays audio from the ad during the video, and then never switches to the video audio. I suggest testing your software more extensively before claiming "the bug was fixed in v0.3.6"
- Codo Coderson
- It works great and it's really well programmed 👌🏼
- Seth Peace
- I gave microphone permission but it complains "Permission denied. You need to allow access to microphone in order to access the audio output device." I really want this feature because my bluetooth earbuds have delay but my speakers don't, so switching between the two would be nice.
- Markus Downhouse
- For me, Bluetooth delay is 170ms. I have synced my main speaker with a Bluetooth speaker with Voice Meter. Now, just like in VLC you can reverse the delay in Youtube with this. The source code is based. Great! I'm sad Manifest V3 is forced in chrome in a few months, killing this extension.
- Cork
- Nice
- Niramit Cheunprapanusorn
- Good tool for bluetooth headphone! The delay is adjustable
- Carl И
- Tried it but it just mutes the sound when enabled. Using Bluetooth headphones that are about 40 ms delayed
- Broeder Said
- uitstekend en werkt super goed. Zou je dit ook willen maken voor windows? zodat de vertraging van mijn bluetooth speaker bij films in andere apps ook gecorrigeerd kan worden. eventueel tegen een vergoeding
- Pacdev
- I don't usually review a chrome extension, but boy is this such a lifesaver!
- bill
- I think it has some issues with SponsorBlock autoskipping segments. Half the time the video just ends up muted
- Magni Lüthi
- does this work for netflix????
- Weihan Kong
- This extension does not work for my YouTube videos played in my chrome. I'm using Macbook. The change of "Audio Delay" does not have any effect.
- Jaeyoung Choi
- It works - sorta... When I turn on the Auto Toggle with my LG TFP-8 bluetooth on, it simply mutes everything. But it works without the Auto Toggle function, so it's a win I guess...?
- Alex Stromin
- This extension simply does not work, I have made sure I have the latest version of it as well as an updated version of Chrome but it still just mutes the video entirely and doesn't have any function as an extension. I keep seeing comments by the developer saying 'the bug was fixed' alas no such bug was fixed. Disappointed! Seems like an easy fix
- Choonik Lee
- Thanks for fixing the bug! It works wonderfully!!!
- Franco Ollino
- It works for half a second then the audio gets silent, tried it for several days and nothing made it work
- Pedro Henrique
- the extension don't work for me and mute's the youtube audio. my version:98.0.4758.91(edit) sorry is my version
- LMT
- Sound quits with almost all videos, no update, no reply for inquiry
- LUCAA LIIMA
- Está silenciando os vídeos no Chrome
- Yang Du
- This extension works like a charm on my Macbook Pro. However on my Windows 10 machine, there's no effect at all even after I restarted the browser. Is there something wrong with my computer?
- Eddy Couvreur
- Une mise à jour semble corriger le problème de coupure du son sur certaines videos. Merci.
- Niketan Kumar
- can we get the same for TWITCH pls
- DubbleTee-
- Doesn't work. Actually disables all audio on youtube.com.
- Carl La Fong
- Really needed a utility like this but it simply does not work, Every time it's enabled, it completely kills the audio. Toggle off, audio returns. I tried uninstalling/re-installing but it did not help.
- Matheus Albuquerque
- Worked great before. Now it mutes videos on Edge.
- pluvillion
- It only worked one time and upon exiting and reopening Edge the whole extension now breaks the site. - It either plays only the audio and the site it stuck with infinite loop. - Video plays but the audio is crackling. - Video DOESN'T play past a certain point. - Reloading the whole site is basically the final nail in the coffin (the whole site just crashes). The only fix would be removing the extension altogether. Trying to reinstall it will cause all the issues to resurface so there's really no point.