Well, not sure, but I think this link might help

http://windows.microsoft.com/en-US/windows/downloads/windows-media-player/visualizations

Try this

1 Run one of the already installed visualizations by right-clicking on the Windows Media Player's "Now Playing" screen. Choose an option from the list such as "Alchemy," "Bars and Waves" or "Battery."
2 Download and install more visualizations by right-clicking on the main menu bar.
3 Click "Tools," then "Download" and select "visualizations." You will be taken to the online download page.
4 Download any visualization you want from the online list by clicking the "download" button next to each one. Some are free. You'll have to pay for others.
5 Click the "Download" button on the following page if you are taken to the visualization author's webpage.
6 Save the .exe install file to your desktop and double-click on it to start the install. You may need to agree to "Run" the file.
7 Go to the "Now Playing" tab in your media player. Right-click on the page and you should see the new visualization.

If you want a greater variety of visualizations in Windows Media Player 11, you can download new ones: