iMovie, such a Mac built-in video editor, offers a library of sound effects that you can apply to enrich and enhance your video file. Also, the advanced search capability is featured, which enables you to hunt for specific sound effect track and use it in a video. If you are preparing to add sound effects to iMovie on Mac, follow the minute description to make it happen with high efficiency.
Note: Remember that the video formats supported by iMovie include MP4, MPEG-4, MPEG-2, AVCHD (Advanced Video Coding High Definition), MOV (QuickTime Movie), DV (Digital Video), HDV 720p/1080i (High-Definition Video), and M-JPEG. Videos encoded with WMV, AVI, SWF, FLV, F4V, and MKV are not well accepted by iMovie. So, make sure that the video to which you are going to add sound effects on iMovie can be compatible with it. That's very important. Please pay more attention.
Step 1 Open iMovie and add target project
Open iMovie on your Mac computer and start a new project by clicking on "+" > "Projects". Then, head to "File" > "Import Media..." to summon the import window and select the target file to iMovie. The uploaded file will be displayed in the timeline.
Step 2 Go to "Sound Effects"
From the editing tool menu, choose "Audio" and then to "Sound Effects" at the side bar of this option. There are dozens of canned sound effects. You can double-click the sound track to preview so as to apply the most pleasant one to your video. Also, you are allowed to enter the name of your desired sound effect in the search field. After selecting what you like, drag it to the video project in the timeline. The sound effect will be displayed as the track with the green background under the your video file. Based on your requirements, freely position or trim the sound effect file.
Step 3 Export the video with sound effect
Finally, you just need to export the video. To do so, you have to click the "File" option > Share" > "File..." to save the created video to the system. Or, you specify the output path as you like.