PStwo 3 Channel Audio Light Show
Check it out This is a cool project and Cheap. A few dollars in parts. Its a light show for your PStwo grill. The audio from a game, movie or whatever is converted to light. There are 3 bandpass filters spliting the audio spectum into 3 bands low, medium, high. The output is displayed via 3 different color LEDS I used SM type but just about any could be used.
Attached is a MPEG movie with sound of the mod in action.
R4, R5, R6 I ended up using 0 ohm resistors to get MAXIMUM brightness. Matching LED's is a must! Up to 3 led's per band would be OK.