Home : File Types : AU File (2 File Associations)

.AU File Extension

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File Type 1Audacity Audio File

DeveloperAudacity
Popularity
3.5 (2 Votes) Thanks for voting!
Rare Uncommon Average Common Very Common
CategoryAudio Files
FormatBinary

Binary

This file is saved in a binary format, which requires a specific program to read its contents.

Definition

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).

More Information

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.

Program(s) that open .AU files
Microsoft Windows LogoWindows
Audacity
Mac OS X LogoMac OS
Audacity
Linux LogoLinux
Audacity
Updated 5/10/2012

File Type 2Audio File

DeveloperN/A
Popularity
3.1 (8 Votes) Thanks for voting!
Rare Uncommon Average Common Very Common
CategoryAudio Files
FormatBinary

Binary

This file is saved in a binary format, which requires a specific program to read its contents.

Definition

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.

Program(s) that open .AU files
Microsoft Windows LogoWindows
Nullsoft Winamp
Microsoft Windows Media Player
Apple QuickTime Player
RealNetworks RealPlayer Cloud
Adobe Audition CC
VideoLAN VLC media player
Mac OS X LogoMac OS
Apple QuickTime Player
RealNetworks RealPlayer Cloud
Adobe Audition CC
VideoLAN VLC media player
Linux LogoLinux
VideoLAN VLC media player
Updated 12/31/2014