LanguageAU
Unix audio sound file format
File type: Mobile ringtone file, Audio and sound file
An au file extension is associated with the Unix audio sound file format developed for Unix and Unix-like operating system to store audio data and sounds.
Found 2 different file type records with the same au filename suffix.
What is au file?
File type category:
Mobile ringtone file
Audio and sound file
Date updated: July 13, 2025
The au file extension is also related to UNIX-generated sound files.
Probably very similar to SND, an interchangeable sound file format that is used on Sun, NeXt, and Silicon Graphics computers. The file typically contains raw sound data that is followed by a text identifier.
AU is a sound file format developed by Sun for the Unix platform for use on the Internet. It is known as the Sparc-audio or u-law format.
How to open au file?
Use compatible media player to playback *.au Unix audio files.
How to convert au file?
It is likely that audio files in AU format can be converted to other multimedia files using a proper conversion software.
Suggested software to open au file:
Associated software actions with the au file
Software applications that can open au files:
WavePad (Microsoft Windows)
Software applications that can edit au files:
WavePad (Microsoft Windows)
Apps designed for playing au files:
VLC media player (Microsoft Windows)
Winamp (Microsoft Windows)
Awave Studio (Microsoft Windows)
Adobe Audition (Microsoft Windows)
Microsoft Windows Media Player (Microsoft Windows)
RealPlayer (Microsoft Windows)
Apple QuickTime for Mac (Apple macOS / Mac OS X)
VLC media player for Mac (Apple macOS / Mac OS X)
Adobe Audition for Mac (Apple macOS / Mac OS X)
Unix (Linux/Unix)
VLC media player for Linux (Linux/Unix)
VLC media player for Android (Google Android)
Software apps that convert au files:
Freemake Video Converter (Microsoft Windows)
Software apps that import au files:
RatHole (Microsoft Windows)
Tiny Audio Converter (Apple macOS / Mac OS X)
Software apps that export au files:
Tiny Audio Converter (Apple macOS / Mac OS X)
Software applications that handle other tasks involving au files:
Adobe Audition (Microsoft Windows)
Adobe Audition for Mac (Apple macOS / Mac OS X)
Audacity audio block
File type category:
Audio and sound file
Date updated: April 13, 2018
The au file extension is associated with Audacity audio editing application.
Behind the scenes, large audio files are broken up into chunks of just over a megabyte in size, which Audacity calls block files with au file extension.
The Audacity au files are not compatible with au Unix audio files.
How to open au file?
Use Audacity to open *.au audio block files.
How to convert au file?
Probably can be exported to other formats.
Suggested software to open au file:
Associated software actions with the au file
Apps designed for playing au files:
Audacity (Microsoft Windows)
Audacity for Mac (Apple macOS / Mac OS X)
Audacity for Linux (Linux/Unix)
Software apps that create au files:
Audacity (Microsoft Windows)
Audacity for Mac (Apple macOS / Mac OS X)
Audacity for Linux (Linux/Unix)
Software apps that export au files:
Audio Record Expert (Microsoft Windows)
Software applications that handle other tasks involving au files:
Audacity (Microsoft Windows)