
+ plus button in the Files section.

How Descript creates optimized assets from your project files
When you add a file to a project or record directly in Descript, Descript works with two versions of it:- The original file. Your imported file (or, if you recorded in Descript, the new recording) is uploaded to the cloud. Descript uses this version when you export your composition.
- An optimized version for editing. Descript creates smaller, playback-ready versions of your media in the cloud and streams them to the app as you edit, so playback stays smooth without large files on your computer.
How Descript handles files with different sample rates
If your project contains audio files with different sample rates (e.g. 44.1k, 48k), Descript treats them as follows:- For timeline exports, Descript converts all the files to the highest sample rate in the project.
- All files will be at a 44.1k sample rate during playback in the app.

