I have a very cool suggestion for you:
1: Download the free SoundStream screeensaver and install it, set it as your screensaver.
http://pcheese.net/software/soundstream/
2: Next open AppleScript Editor and paste this script in:
tell application "System Events"
if process "ScreenSaverEngine" exists then
tell application "ScreenSaverEngine" to quit
else
do shell script "System/Library/Frameworks/ScreenSaver.framework/Versions/A/Resources/ScreenSav erEngine.app/Contents/MacOS/ScreenSaverEngine -background > /dev/null 2>&1 &"
end if
end tell
4: Now Save the script "DeskScreen" as a Application to your Utilities Folder and drag a alias to the Dock.
5: Hide the Dock (optional)
6; Play iTunes and enable the "DeskScreen" and enjoy, uses your microphone and the sound to create effects.
7: To stop the effect, just click the "DeskScreen" icon in the Dock again and it turns off. You have full use of the computer too.
8: Works with most screensavers. Eats CPU/GPU, so you might want to cut it off when your using the machine for heavy duty programs.
Enjoy 🙂
and a bonus....free 3D game...
http://sauerbraten.org/