iMovie is a popular video editing tool like no other for Macs. This article is packed with tips that can help you get the best out of your audio editing on iMovie 10. The audio is just as important as the images in a video and should be given just as much attention during the editing process.
Use Waveforms to See What You Hear
To properly edit audio, you need a good set of speakers and headphones to hear the sound, but you also need to be able to see the sound.
You can see the sound in iMovie by looking at the waveforms on each clip. If the waveforms aren’t visible, go to the View drop-down menu and select Show Waveforms. To get an even better view, you can also adjust the clip size for your project so that each video clip, and its corresponding audio, is enlarged and easier to see.
The waveforms will show you the volume level of a clip and can give you a good idea of what parts will need to be turned up or down before you even listen. You can also see how the levels of different clips compare to one another.
Audio Adjustments
With the Adjust button in the top right, you can access some basic audio editing tools for changing the volume of your selected clip, or changing the relative volume of other clips in the project.
The audio adjustment window also offers basic noise reduction and audio equalization tools, as well as a range of effects—from robot to echo—that will change the way people in your video sound.
Editing Audio With the Timeline
iMovie lets you adjust the audio within the clips themselves. Each clip has a volume bar, which can be moved up and down to increase or decrease the audio level. The clips also have Fade In and Fade Out buttons at the beginning and end, which can be dragged to adjust the length of the fade.
By adding a short fade in and fade out, the sound becomes a lot smoother and it’s less jarring to the ear when a new clip begins.
Detaching Audio
By default, iMovie keeps the audio and video portions of clips together so that they are easy to work with and move around in a project. However, sometimes, you want to use the audio and video portions of a clip separately.
To do that, select your clip in the timeline, and then go to the Modify drop-down menu and select Detach Audio. You’ll now have two clips—one that has just the images and one that has just the sound.
There’s a lot that you can do with the detached audio. For example, you could extend the audio clip so that it starts before the video is seen, or so that it continues for a few seconds after the video has faded out. You could also cut out pieces from the middle of the audio while leaving the video intact.
Adding Audio to Your Projects
In addition to the audio that’s part of your video clips, you can easily add music, sound effects or voiceover to your iMovie projects.
Any of these files can be imported using the standard iMovie import button. You can also access audio files through the Content Library (in the bottom right corner of the screen), iTunes, and GarageBand.
Note: Having access to a song through iTunes and adding it to your iMovie project, doesn’t necessarily mean that you have permission to use the song. It could be subject to copyright violation if you show your video publicly.
To record a voiceover for your video in iMovie, go to the Window drop-down menu and select Record Voiceover. The voiceover tool lets you watch the video while you’re making the recording, using either the built-in microphone or one that plugs into the computer over USB.
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