The last one for now.
Thanks to the teams of Papervision 3D and FlashDevelop.
The music I use here is from David Rovics "black flag flying".
It is free.
It is ~8mb so please be patient.
In the end I must say a black flag flying as a 3D object would wit better to the song, but heck I'm sick of computeSpectrum(), allright? great.
If you want to you can get the source Code in this deviation:[link]
This thing is interactive.
click on the screen to change the color.
Hit return to toggle between two display methods.