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.
Calibration measures your device's camera and microphone pipeline latency. A flash + click fires simultaneously; the app times how long the mic takes to detect it.
If auto-calibration doesn't work, enter a known value or leave at 0. For most Pro Tools AV sync measurements (40–200ms range), a 0ms calibration offset is accurate enough to be useful.
iPhone latency is typically 10–25ms. Android varies by device.
2-Pop (1kHz, 1 frame @ 24fps) — The classic approach. A single frame of 1kHz tone placed exactly 2 seconds before your sync point. Pair it with a single white flash frame on the video track at the same timecode. Simple and universally understood.
Click Train (10 clicks @ 1s intervals) — Ten sharp 1kHz clicks spaced one second apart, each paired with a flash frame on video. Best for taking multiple captures in a single playback pass and averaging the results.
Sync Burst (2kHz bursts @ 0.5s intervals) — Short 2kHz tone bursts every half second. The higher frequency and shaped envelope make them easier for the app to detect cleanly in noisier rooms.
All files should be 48kHz / 24-bit stereo WAV, placed on a dedicated audio track in Pro Tools with hardware monitoring bypassed.
Press Start, then play your test video.
Both must flash to record a capture. If only one fires, check your test signal setup.