Flash sound spectum equilizer help

I want to make a “digital equilizer” that will sync with a music track…much like you would see in a winamp visualization. I have no idea how to do it…can anyone help me…
Thx

Check this tutorial…
http://www.flashkit.com/tutorials/Audio/Flash_Au-Inn_Chan-849/index.php

And also… I believe there is something called FlashAMP or something like that which helps you to do this as well.