when to use it
What an audio sync test measures
An audio sync test measures the delay you experience on a real browser, device, and output path. It is useful when speech, a game impact, or a video flash does not line up with the sound.
Use Tap Test for headphones and earbuds, Mic Round-Trip when a microphone can hear a speaker, and A/V Sync when you need a correction value rather than a single latency number.
Compare the real pathTest the same TV, soundbar, headset, or capture card used for the problem.
Watch jitterA stable average with low jitter is more useful than one unusually fast response.
online workflow
How to use an audio video sync test online
Keep the browser tab active, set a comfortable volume, and run the same mode several times. Change only one setting between runs so you can tell whether a codec, Bluetooth game mode, browser, or output device helped.
For an audio video sync test online, use the exact display and speakers that show the problem. A laptop, HDMI TV, soundbar, streaming app, and wireless headphones can each add a different delay.
Start with one modeUse A/V Sync for picture-versus-sound alignment and Tap Test for isolated headphone timing.
Repeat after one changeCompare before and after results instead of mixing several device changes.
read the result
How to read an audio offset test result
Treat the average as the practical estimate and jitter as the consistency signal. A high average with low jitter suggests a repeatable device delay; a low average with high jitter suggests an unstable path or inconsistent taps.
The displayed offset is a starting value for a player, TV, game, or capture workflow. It is not a laboratory calibration number, so confirm it with real speech, claps, or gameplay after applying the correction.
Offset is directionalDecide whether sound feels early or late before entering a positive or negative correction.
Use real contentA lip-sync scene and a rhythm game can reveal different timing problems.
lip-sync fixes
Use the result for lip sync and real video
If the tool looks aligned but real content is still wrong, check whether the player, TV, console, capture card, or streaming app adds a second offset. Use the same content type that exposed the problem and test near the start and end of playback.
Audio sync check, audio offset test, and lip-sync video testing all belong to the same correction workflow here. Broader audio latency test or headphone delay test intent belongs on the related tools, so this page stays focused on audio-video alignment.
Align by feelThe best correction is the setting that makes the flash and beep land together.
Keep a baselineRecord the device, browser, mode, average, jitter, and applied offset for later comparison.
next tests
Related audio latency tools
quick answers
Audio Sync Test Online FAQ
How accurate is this audio sync test online?
It is a practical browser estimate. Repeat the run and compare the same device path; use professional loopback hardware when you need studio certification.
How do I use an audio video sync test?
Run A/V Sync, watch the flash, listen for the beep, choose whether sound feels early or late, and apply the displayed offset in the player or device before testing real content again.
What does an audio offset test tell me?
It gives you a repeatable correction starting point. It does not prove that every app, TV, or Bluetooth codec uses the same delay.
Can this test find lip-sync delay in a video?
Yes. Use the same screen and output path, then confirm the result with speech, claps, or an action scene after applying the correction.
Should I use this or the Headphone Latency Test?
Use Audio Sync Test for picture-versus-sound alignment. Use Headphone Latency Test when you want to compare wired, wireless, or Bluetooth headphone delay.
Does the test upload recordings?
No. Timing is analyzed in the browser. Mic mode requests microphone access only while that test is running.
