doc iconau extension stands for audio files. You may try to open au files by using Media Player or Quicktime player softwares.

It is basic type music and audio file. Au files are used with Sun Microsystems and Unix systems. You can try to run au files by using Quicktime Player or Media Player softwares. 
You may need to edit, cut or merge files. In this case you should download and use c_edit softwares. You may find different web pages that allow you to get c_edit free.

What to use au

Media Player, Quicktime player, Real player

which page related to au file

au Related Searches

You can check related links about au fileextension.