Howto change default applications for mime-types (in thunar)

[daniele favara]

On 1/14/06, Benjamin Geese <cowfama at web.de> wrote:
> Hi,
>
> im using Xubuntu with Breezy and i love it. Thank you very much for
> doing this.
>
> I have a small problem with thunar which, in my opion, should affect
> other applications as well:
> thunar opens files with the associated "default application". this
> worked fine for me, util i installed audacity. now when i click on a ogg
> or mp3 file, audacity opens instead of beep-media-player or xfmedia.
>
> So my question is : Where does thunar gets its information which
> mime-type should be opened with which application.
> Where can i change the default-application fpr a specific mime-type.
>
> Google answers: use nautilus, which i dont want to install.
>
> greetings

desktop files ?

/usr/share/applications/

MimeType.....but  how does it choose the default ?