.auf — Audacity Project File
Audacity · 2000
An .auf file is a project file used by the Audacity audio editor to save your work-in-progress, not a final playable audio track.
Key Features
- Preserves all editing steps and undo history.
- Stores multiple audio tracks and their arrangement.
- Allows non-destructive editing of audio content.
- Acts as a container for your audio project's state.
Best For
- Saving complex audio editing sessions in Audacity.
- Maintaining the ability to undo or redo edits.
- Keeping a record of all applied effects and their settings.
- Continuing work on multi-track audio projects.
Less Ideal For
- Sharing finished audio with others for listening.
- Creating audio files for websites or streaming.
- Directly playing audio in media players.
- Importing into video editing software as a final audio track.
Common Use Cases
- Saving an audio project mid-edit to resume later.
- Archiving the source project for potential future revisions.
- Collaborating on audio projects by sharing the project file.
- Experimenting with different effects and edits without committing.
How to Open It
- Open the Audacity software.
- Go to 'File' > 'Open' or 'File' > 'Restore From (backup)' if prompted.
- Navigate to and select your .auf project file.
- Note: .auf files can only be opened and edited within Audacity.
What is a .auf file?
An .auf file is a project file created by the free and open-source audio editor Audacity. It's not a playable audio file but rather a workspace that stores all your editing information, including audio tracks, effects applied, and editing history. This allows you to revisit and continue working on your audio projects without losing any of your progress. When you're ready to share your final audio, you'll need to export it to a standard audio format like WAV or MP3.
Programs That Open .auf Files
| Platform | Program | ||
|---|---|---|---|
| Windows | Audacity | Free | Official |
| macOS | Audacity | Free | Official |
| Linux | Audacity | Free | Official |
How to Convert .auf Files
| Format | Method |
|---|---|
| .WAV | Audacity Export, FFmpeg |
| .MP3 | Audacity Export, FFmpeg, Online Converters |
| .OGG | Audacity Export, FFmpeg |
Common Problems with .auf Files
Frequently Asked Questions
No, an .auf file is an Audacity project file. It contains instructions and data for Audacity to reconstruct your audio project, but it's not a playable audio file itself. You must export your work to formats like MP3 or WAV for listening.
No, .auf files are designed exclusively for Audacity. Media players cannot interpret this format.
Project files can be large because they store extensive editing data, undo history, and potentially uncompressed audio segments. The final exported audio file size will be much smaller.
Technical Details
The .auf format is a proprietary project file format specific to Audacity. Internally, it's structured as a directory containing several files, including a primary .aup file and an associated _data folder. The .aup file itself contains metadata about the project, while the _data folder holds raw audio chunks. This structure enables Audacity to non-destructively edit audio and retain undo history.