The File Extensions Database


.AU File Extension

  • Developer by: Audacity
  • Category: Audio Files
  • Format: Binary

What is an .AU file?

.AU is Audacity Audio File

Audio file created by Audacity, a free, cross platform audio editor; uses a proprietary format that can only be opened by Audacity; saved as one of multiple audio data files for an Audacity project (.AUD).

When you created a project in Audacity and import audio files, the audio data is converted to the AU format and is stored in a folder with the project called myproject_data, where the project name is myproject.aud. When done editing a project, you can export the audio to several standard formats, including .MP3, .WAV, and .M4A.

NOTE: Audacity's AU format is not compatible with the standard AU audio file format.

Programs that open Audacity Audio File
Windows
Audacity
Mac
Audacity
Linux
Audacity
File Type 2 Audio File
Category: Audio Files Format: Binary

Audio file introduced by Sun Microsystems; used primarily on Sun or other Unix-based machines and has been adopted by several audio programs, including Adobe Audition and QuickTime; stores the data in three parts: a header (24 bytes), a variable length annotation block, and the actual audio data.

Programs that open Audio File
Windows
File Viewer Plus
Nullsoft Winamp
Microsoft Windows Media Player
Apple QuickTime Player
RealNetworks RealPlayer Cloud
Adobe Audition CC 2019
VideoLAN VLC media player
Mac
Apple QuickTime Player
RealNetworks RealPlayer Cloud
Adobe Audition CC 2019
VideoLAN VLC media player
Linux
VideoLAN VLC media player

How to solve problems with AU files

  • Associate the AU file extension with the correct application. On :
    Windows: Right click on any AU file and then click "Open with" > "Choose another app". Now select another program and check the box "Always use this app to open *.AU files". Mac: Right click (or Ctrl-click) the AU file, then click "Open with" > "Other...". Then choose another program and check the "Always Open With" box. Linux: Right click on the file, and select "Open with" and choose another program. iPhone: Tap the file. If you do not see an app to open the file, then tap Share "Share" and choose an app. Alternatively, save the file. Then open the Files app Files app. There long-press on the file, then release your finger. You will see a black menu bar. Then tap "Share" and select an app. Android: Tap the Settings icon on your smartphone, then tap on the Apps section. There tap the Options icon in the top right-hand corner of the screen to change the default apps.
  • Update your software that should actually open .AU is Audacity Audio File. Because only the current version supports the latest AU file format. Search, therefore, e.g. on the Audacity manufacturer website after an available .AU is Audacity Audio File update.
  • To make sure that your AU file is not corrupted or virus-infected, get the file again and scan it with antivirus software.