24/09/2026
Test A/V Sync more accurately
Sample Level accuracy with A/V Sync Precision Sync Marker (PSM)
Why not just use a beep?
A conventional tone can tell you roughly where an audio event occurs, but determining the exact starting point is much harder. Its waveform doesn't provide a uniquely identifiable reference point, and real-world recording and playback can make that point even less distinct.
A/V Sync's Precision Sync Marker is designed specifically to solve this problem. Its unique coded pattern gives the system a distinctive signature to find, allowing it to determine exactly where the marker occurs in the audio stream. Once that reference is located, A/V Sync can measure the audio/video offset with sample-level precision.
https://www.drastic.tv/index.php/support-59/supporttipstechnical/282-precision-sync-marker