In Final Cut Pro, you can expand the audio component of a clip in the timeline to:
Trim the clip’s audio independently of its video (to make the audio overlap the next video clip, for example)
Adjust the clip’s audio channels separately from one another (to adjust just one channel in a stereo recording, for example)
In Final Cut Pro for iPad, open a project.
Do one of the following:
Expand the audio component of a single clip: Touch and hold a clip in the timeline, then tap Expand Audio Components. (If a keyboard is connected or paired to your iPad, you can also press Control-S to expand an audio component.)
Expand the audio components of multiple selected clips: Select multiple clips in the timeline, touch and hold one of them, then tap Expand Audio Components.
Expand the audio components of all clips: Tap Options in the top-right corner of the timeline, then tap Expand All Clips.
After you expand the audio component of a clip, you can trim the audio portion of a clip independently of the video portion and adjust individual audio channels in the clip.
After you adjust an expanded audio component, you can collapse it again.
With a project open in Final Cut Pro for iPad, do one of the following:
Collapse the audio component of a single clip: Touch and hold the clip (above the audio component) in the timeline, then tap Collapse Audio Components. (If a keyboard is connected or paired to your iPad, you can also press Control-S to collapse an audio component.)
Collapse all audio components: Tap Options, in the top-right corner of the timeline, then tap Collapse All Clips.
If you trimmed the audio component of a clip, when you collapse it, the new duration of the audio component is shown as a thin bar below the clip.