Studio Sound is a powerful feature that uses Artificial Intelligence to enhance speakers' voices while reducing and removing background noise, room echo, and other sounds you don't want.
File size limitation
Studio sound can be applied to files that are up to 6 hours long.
Using Studio Sound
To enable Studio Sound on a file, open the File Viewer by selecting the file in the Project Files folder of the Project Sidebar. Once you've opened the File Viewer in the Inspector sidebar, click the Studio Sound checkbox under the Effects section.
A popup message will appear indicating that Studio Sound is being applied to the file (this may take several minutes depending upon the size of your file).
After the audio is enhanced, you'll see the Studio Sound toggle turned on, signifying that the enhancement is completed. You can enable and disable Studio Sound on the file from this view moving forward.
You can also enable Studio Sound from the Clip Inspector. To do so, select your clip and open the Clip Inspector and click Add Effect. From there, you'll see an option to apply Studio Sound at the top of the list of effects.
Applying Studio Sound to a clip
Studio Sound can only be applied to the entirety of a source file which means that all instances of that file in a Project will be affected when you enable it.
The best way to apply studio sound to just a specific portion of your source file would be to use Clip to Composition to copy that file out to a new workspace, and then use the Flatten Tracks feature on that Composition which will render a new source file with just the contents of that clip.
You could then apply studio sound to that newly generated file and replace the original section in your timeline with the enhanced file.
You can control the amount of the Studio Sound effect from the Clip Inspector by adjusting the Intensity dial, or manually typing in the percentage of intensity.
Enabling Studio Sound on screen recordings
Studio Sound can be enabled for screen recordings in the Screen Recording menu as shown below.