Add cool new visualizations to Totem/Rhythmbox

Both Totem and RhythmBox include a funky animation that appears
during music playback. Animations such as this are known as visu-
alizations, but out-of-the-box Ubuntu only includes one, rather than
the hundreds found on the likes of Mac OS or Windows media players.
However, you can add-in more to Ubuntu, for use in both Totem and
RhythmBox, by using Synaptic to search for and install the libvisual-0.4-
plugins package.
Once the package has installed, to change the visualization in Totem
that appears when a music track is playing, click Edit → Preferences,
select the Display tab in the dialog that appears, and make your choice
from the Type of visualization dropdown list. Your choice will take effect
immediately, so drag the preferences dialog out of the way to preview
it.
In RhythmBox, click View → Visualization to start the animation and
then select from the dropdown list beneath the visualization.

Taken from Ubuntu Kungfu.