FPS
60.0
MS
000
OFFSET
0ms
DISPLAY
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Measure exact A/V sync offset between video and audio signals using this millisecond-accurate calibrator for OBS, vMix, and live switchers.
Essential for diagnosing lip-sync drift in broadcast environments. Ensure your audio is perfectly aligned by checking your audio latency or follow our broadcast sync guide.
Measure offset between a camera's HDMI capture card output and its separate Dante audio channel in vMix before going to air.
Diagnose sync drift in OBS when using a Blackmagic capture card alongside a USB microphone with different OS buffer sizes. Once you identify the drift, use our audio latency calculator to find the exact compensation offset in ms.
Calibrate lip sync on a soundbar or AV receiver connected via eARC, where audio processing may add 80–120 ms of delay.
Verify that monitoring feeds on an XR stage are synchronised so directors and ADs receive a coherent picture. For professional volumes, ensure you follow our Genlock vs Timecode guide to prevent scanline tearing.
Save this for your next project or share with your engineering team.
A millisecond-accurate visual synchronizer that allows engineers to measure the offset between video frames and audio samples using high-resolution browser timing (requestAnimationFrame).
This utility was engineered to eliminate the guesswork from high-pressure broadcast environments. Whether you are managing multi-camera sync or complex IP networking, precision measurements ensure that the technical infrastructure stays stable throughout the duration of the event.
The primary tool for debugging lip-sync errors in OBS, vMix, or hardware switchers after capture card processing. Used to determine the exact 'Sync Offset' required in your audio mixer.
Understanding these variables is critical for minimizing system-wide latency and avoiding technical debt in live productions. This tool provides instant validation of your technical specifications before you even power on a single piece of hardware.
Synchronizes a visual flash (DOM paint) with an oscillator BEEPC (WebAudio API) based on a single shared micro-timestamp. Any deviation from the center line represents your system's processing latency.
Our formulas are based on established SMPTE and EBU standards. By calculating these values theoretically, engineering teams can design predictable workflows and set clear expectations for clients regarding production quality and protocol limitations.