Media Player to play .au files.
When you run
RealPlayer for the first time, deselect
the Configure Mozilla Helpers option. This ensures that
Java Media Player as
the default application for .au and .aif
However, if you have already configured
Mozilla to use
RealPlayer to play .au and .aif files, perform the following steps:
Choose Edit ->Preferences and then select Navigator -> Navigator -> Helper Applications from the Category sidebar.
Create a new entry, or edit the existing entry for each of
the following file/MIME types:
Set the associated action in each entry to Open
it with: /usr/bin/jmplay
See also 2.7.3 Mozilla .