Flatbed Editor - Process - Synching

Synching

Since picture and sound are usually recorded separately, the editor must synchronize them. The editor loads one picture roll onto a film plate and its corresponding Mag roll onto a sound plate. Then they advance the film to find the frame where the two parts of the Clapperboard came together. The editor repeats the process on the Mag roll to find the frame with the clap sound. Once found, they mark the frame on both rolls as the sync point, and switch the flatbed to Interlock mode. From then on, both picture and sound rolls advance or reverse by exactly the same amount to maintain sync.