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I found a sick itunes keyboard backlight visualiser
you keyboard backlight flashes to the beat!!!! so sick, and fun to impress your friends by your obvious knowledge and great taste in music... (lol)
with some music, its not as good, because it visualises by volume... so if the music has a constant volume like techno and oldschool workout music, its not as impressive, it works good with rock and distinct beats. either way, its sick... and heeeaaarrrsss the link...