Sync and Video : Working with Synchronization : Identifying a Synchronization Point

Identifying a Synchronization Point
The Pro Tools Identify Sync Point command lets you identify a specific point within a clip for audio spotting purposes.
Imagine the following sound effects spotting scenario: You have a single sound effect that consists of a creaky door slamming shut, followed by a few seconds of ambient reverberation. The slam portion of the effect—which you must precisely match to picture—occurs neither at the very beginning of the audio file nor at the very end. It is somewhere in the middle, making it tough to spot. In this scenario, use the Identify Sync Point command to create a point in the clip and synchronize that point to a SMPTE frame.
To create a sync point in a clip:
1 Do one of the following:
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Click with the Selector tool at the point in the clip that you want to synchronize to a SMPTE frame location.
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2 Choose Clip > Identify Sync Point. The current SMPTE time is automatically entered as the SMPTE location for the sync point. A small down arrow appears at the bottom of the clip, with a vertical, light gray line indicating the location of the sync point.