The Hypnogenic Screen Saver is a highly configurable audio-visualization generator that produces an incredible variety of colorful mathematical patterns that can synchronize with the audio on your PC. Included are hundreds of preset configurations that demonstrate some of the capabilities of the software. If you're feeling adventurous you can use the built-in editor to create your own displays using a huge library of pattern generators, palettes, and controls. Put on some music, fire it up, and watch the show.
Download and use it now: The Hypnogenic Screen Saver