In order for you to play AudioSurf on Windows with minimal graphics settings, your computer must meet the following requirements
OS *:
Microsoft® Windows® XP/Vista
Processor (CPU):
1.6 GHz Intel® Pentium® 4
Memory (RAM):
512 MB RAM
Graphics Card:
32 MB NVIDIA GeForce® 2 (support for Pixel Shader 3.0 recommended)
DirectX Version:
DirectX® 9.0 or higher
Sound:
DirectX® 9.0c-compatible sound card