An SESX file is a session file created by Adobe Audition, a premier digital audio workstation (DAW) used for audio mixing, editing, and restoration. Unlike an actual audio file such as an MP3 or WAV, the SESX file does not contain raw audio data itself. Instead, it acts as a project container that stores references to all audio clips, video files, effects, volume automations, track arrangements, and settings associated with a specific multitrack project. When a user opens an SESX file, Adobe Audition reads the instructions within the project file and reconstructs the workspace, loading the necessary source media from their respective file paths. This non-destructive editing approach allows sound engineers, podcasters, and music producers to make complex edits, apply filters, and alter audio properties without permanently modifying the original source recordings. These files are essential for professional audio post-production workflows in film, television, radio, and music recording.