Ubuntu: Howto setup mp3 preview on Mouse-Over

Straight from Ubuntuguide.org:

You can also get Mouse over preview to work by installing:

sudo apt-get install mpg321
sudo apt-get install mpg123-esd
sudo apt-get install vorbis-tools
sudo apt-get install esound
sudo apt-get install ubuntu-restricted-extras

with this system Skype still functions.