# Experience overview

In the starting file, the top row of the timeline contains a series of recordings. The second and third rows contain audio tracks to use as background music.

<figure><img src="https://3460182399-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FwVx6bvwqEE7tD0TYOcfj%2Fuploads%2Fgit-blob-37a496898c74a296112c17f38f2fe7d602d773dd%2Ftut_pres_overview.jpg?alt=media" alt=""><figcaption><p>Timeline of the starting file</p></figcaption></figure>

Recordings are saved within the experience file and add to the file’s size. In contrast, IFX are stored on the ENGAGE servers and are downloaded as needed.