iMovie for iOS (iPhone, iPod touch): Adjust audio

Adjust audio

After you’ve arranged your audio clips in the timeline, you can fine-tune volume levels, fade the audio in or out, and even change the speed of your clips.

Adjust volume

  1. With your project open, tap a clip in the timeline to reveal the inspector at the bottom of the screen.

  2. Tap the Audio button .

  3. Do any of the following:

    • To turn sound off or on for a clip: Tap the Mute button next to the volume slider. When the clip is muted, tap the Mute button again to turn sound on.

      When you turn off the sound for a video clip, a mute icon also appears in the upper-left corner of the clip in the timeline.

      Image of the mute icon in the corner of a clip
    • To adjust volume: Drag the volume slider left or right.

      To make sure that the sound in your video clips can be heard over the background music, iMovie applies audio “ducking” to background music. Ducking lowers the volume of background music clips whenever there is a video clip whose sound is playing at the same time. When a video clip’s sound is off, ducking isn’t applied.

  4. Tap outside the inspector to close it.

Fade audio in or out

You can quickly add fade-ins and fade-outs to audio clips in the timeline using fade handles.

Fades appear as shaded areas in the clip to represent where the volume increases or decreases.

If you have a video clip with audio, you must first detach the audio as a separate clip in order to create fade-ins or fade-outs. To learn how, see Arrange audio clips.

  1. With your project open, tap an audio clip in the timeline to reveal the inspector at the bottom of the screen.

  2. Tap the Audio button .

  3. Tap Fade to reveal fade handles at the beginning and end of your clip.

    Image of fade handles in an audio clip
  4. Drag the fade handles to set the duration of the fade-in and fade-out.

Adjust speed

You can adjust the speed of audio clips in iMovie. You can even fine-tune speed adjustments for a single clip by dividing it into ranges, each with its own speed. For example, you could set multiple ranges so that a clip slows down, speeds up, and then slows down again.

  1. With your project open, tap an audio clip in the timeline to reveal the inspector at the bottom of the screen.

  2. Tap the Speed button .

    A yellow bar appears on the clip, with range handles at each end.

  3. To create ranges within a clip, do one of the following:

    • Drag either yellow range handle.

    • Tap Add in the inspector to create another range.

  4. In the inspector, drag the slider right to increase the speed, or left to decrease it.

    As you drag, the relative speed is displayed to the right of the slider (2x means twice the normal speed, 1/2x means half the normal speed, and so on).

  5. If you want to create additional ranges, tap the portion of the clip outside of the currently selected range, or tap Add in the inspector to create a range border at the point of the playhead.

    Drag the yellow range handles to adjust the range, then adjust the range’s speed using the slider.

    Each range you create is indicated by a solid white line in the clip.

    Image of a speed range and a selection with yellow range handles

    To reset your adjustments, tap Reset in the inspector.

  6. When you’re finished, tap anywhere outside of the inspector to dismiss it.

By default, iMovie preserves the pitch of audio clips that are sped up or slowed down. To change this, tap the Project Settings button , then tap to turn on “Speed changes pitch.” This allows a recorded voice to be higher when sped up or lower when slowed down.

Published Date: Apr 3, 2017
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