Apple Cinema Tools 3 - Manual (Page 123)

Chapter 6 Preparing the Source Clips for Editing 123
Making Adjustments to Audio Speed
If you need to make audio speed adjustments in order to re-establish synchronization
with the video, there are various ways you can do this.
Note: The reverse telecine and conform processes automatically adjust the audio speed
in a clip to match changes made to the video frame rate of the same clip.
 You can adjust the speed with the Final Cut Pro Speed command. First, unlink the
audio and the video clips. Select the audio clip in the Timeline, then choose Modify >
Speed and enter a new speed percentage. For example, to slow down an audio clip
by 0.1 percent, enter 99.9. Relink the audio and video clips when you are finished
modifying the speed of the audio clips.
 Some audio recorders and playback equipment can have the speed of their playback
adjusted to sync with the video. When using such equipment, you can capture the
audio with the correct speed for synchronization.
 You can use specialized equipment, such as that available from Aaton, designed to
control and adjust the audio for proper sync with any video rate. You use this
equipment before capturing the audio into your computer.
 If you don’t need the audio speed adjusted for editing, but you do need it adjusted
for the finished project, you can have the audio finished at an audio postproduction
facility that can adjust the speed.
Synchronizing Separately Captured Audio and Video
If you your sound and picture were not synchronized onto videotape, but were instead
captured separately, you can synchronize them in Final Cut Pro.
In Final Cut Pro 4, a new feature called merged clips lets you link one or more source
media files together so that they become one clip. First you synchronize them, and
then you merge them into one clip.
The clapper boards (also called slates) in your shots provide the audible and visible
cues on which to sync your audio and video clips. There are a couple of different
techniques you can use to synchronize clips before merging them, depending on how
you shot your footage.
UP01101.Book Page 123 Thursday, March 10, 2005 3:16 PM