The audio spectrum generated preset in CS6 looks different from most audio spectrums. What exactly is it doing to the actual spectrum to make it look the way it does? And is it possible to get something similar to that to render in realtime for use as a visualizer with a media player, say Winamp or iTunes.
There are lots of options to fiddle with the effects control panel. Do some experimenting. Thursday tutorial that comes up first in the Google search for audio visualizer after effects: Audio Visualization in After Effects « Layers Magazine