An au file extension is related to the Audacity an audio editor. An au file stores audio block.

There is one other file type using
the AU file extension!

au - Unix audio sound file format

Detailed description

Software that open au file

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AU file extension - Audacity audio block

What is au file? How to open au files?

File type specification:

Audio and sound file type icon Audio and sound file type

au file icon: au filetype icon

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.

The default software associated to open au file:

Audacity icon

Audacity logoAudacity  Microsoft Windows software

Company or developer:

Audacity is a free, open source software for recording and editing sounds. It is available for Mac OS X, Microsoft Windows, GNU/Linux, and other operating systems.

Audacity is able to:

  • Record live audio.
  • Record computer playback on any Windows Vista or later machine.
  • Convert tapes and records into digital recordings or CDs.
  • Edit WAV, AIFF, FLAC, MP2, MP3 or Ogg Vorbis sound files.
  • AC3, M4A/M4R (AAC), WMA and other formats supported using optional libraries.
  • Cut, copy, splice or mix sounds together.
  • Numerous effects including change the speed or pitch of a recording.

Audacity for Mac icon

Audacity logoAudacity for Mac  Apple macOS / Mac OS X software

Company or developer:

Audacity for Mac is free multi-track audio editing tool that allows users to record live audio, convert old tapes to modern formats, edit various audio file types, cut, copy, mix audio data and adds various effects, like change speed of audio etc.

Help how to open:

Use Audacity to open *.au audio block files.

How to convert:

Probably can be exported to other formats.

List of software applications associated to the .au file extension

Recommended software programs are sorted by OS platform (Windows, macOS, Linux, iOS, Android etc.)
and possible program actions that can be done with the file: like open au file, edit au file, convert au file, view au file, play au file etc. (if exist software for corresponding action in's database).

Click on the tab below to simply browse between the application actions, to quickly get a list of recommended software, which is able to perform the specified software action, such as opening, editing or converting au files.

au file players - programs that can play au file - Audacity audio block

Programs supporting the exension au on the main platforms Windows, Mac, Linux or mobile. Click on the link to get more information about listed programs for play au file action.

Microsoft Windows:

Apple macOS / Mac OS X:


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