What does AU audio format mean?
AU is a file extension for a sound file format belonging to Sun, NeXT and DEC and used in UNIX. The AU file format is also known as the Sparc-audio or u-law fomat.
How to convert audio file from MP3 to AU format free?
Step by Step
1. Download and install ESFSoft Audio Converter. Run it.
2. Click “Add” button to pick up a MP3 file which then will appear in the file list. Make sure to check it.
3. Select targeted file format AU that you want to output.
4. Click “Convert” button, the file will be converted to AU audio format immediately.