Synchronizing external video playback to audio

Because there is more latency in FireWire video playback than in computer digital audio playback, video playback on an external device will probably be playing back later than the audio tracks in Sonar.

To sync external video to audio

1.	Right-click the Video view and choose Video Properties from the pop-up menu to open the Video Properties dialog box.

2.	On the Render Quality tab of the dialog box, under External DV Output, enter an offset number in the Video Sync Offset field. The number you enter here causes the Video to start playing sooner than the audio. It’s helpful if your video has some pre-roll footage that contains a visual sync point.

Note: The offset is accurate to 3 decimal places, e.g. 1 ms (a thousandth of a second). One frame of video is approximately 33 ms long for NTSC and 40 ms for PAL; the offset will typically be less than 1 second.

3.	Click OK to close the dialog box. Play your video, and readjust the Video Sync Offset number as needed.