Open on your phone or tablet
Sync Offset works best on a mobile device. Point your device's camera at the video monitor connected to Pro Tools, with the mic exposed to your room audio.
Calibrate for your device
Each device has its own camera and microphone latency. Run calibration once to zero out this offset so your measurements are accurate.
Import a test file into Pro Tools
Use a 2-pop or click-train audio file on your Pro Tools session with a matching flash frame on the video track.
Measure — report auto-sends on Stop
Play your session. Sync Offset captures the delta, and when you press Stop, the report fires to your #offset Slack channel automatically.
Sync Offset needs your camera and microphone. Media is processed locally — nothing is recorded or transmitted.
Not yet granted.
Enter your device's camera + mic pipeline latency. This compensates for the phone's own processing delay so measurements reflect your rig — not your phone. Use 0 if unsure.
iPhone 15 / 15 Pro — 20–25 ms
iPhone 14 / 14 Pro — 20–25 ms
iPhone 13 / 13 Pro — 22–28 ms
iPhone 12 / 12 Pro — 25–30 ms
iPhone 11 and older — 30–40 ms
Samsung Galaxy S22 / S23 — 20–30 ms
Samsung Galaxy S21 and older — 30–45 ms
Google Pixel 7 / 8 — 20–30 ms
Not sure? — Use 0 ms. For offset readings of 40ms+, the difference is negligible.
Download the Dolby AV Sync test file provided by Hit Productions. It contains tones and white flash frames designed specifically for sync measurement.
Download Test FileImport into your session
Drag the file into Pro Tools onto a stereo video track. Set your session frame rate to 29.97fps before playing.
Play fullscreen on your monitor
Open the video window in Pro Tools and go fullscreen on your reference monitor. The white flash needs to fill as much of the screen as possible for reliable detection.
Turn your volume up
The audio beep needs to be audible to the phone's mic. Set your monitoring level to a comfortable working volume — not too quiet.
Point and measure
Open the Measure tab, fill in your location and name, point the phone camera at the center of the screen, and tap Start Measuring. Let Pro Tools loop the file for 5–10 captures, then tap Stop.
Press Start, then play your test video.
Both must flash to record a capture. If only one fires, check your test signal setup.