extract the audio from each video clip individually. To do so, follow these steps:
- Click once on a clip in the timeline to select it.
- Choose Advanced➪Extract Audio, or press Ô+J. The audio will now appear as a separate clip in the timeline.
- Repeat Steps 1 and 2 for each clip in the timeline. It may be a good idea to wait until later (like, when you’re done editing the video portion of the movie) to extract audio from your video clips. If you still need to trim the video clip, you’ll have to trim the audio clip separately if it has been extracted