Equalizer with microphone?

Hi Everyone

I m working on Flash equalizer to integrate with the microphone object of the flash. I have checked the equalizer tutorial in Kirupa but it uses a different type of animation than what i m trying to implement. Basically kirupa’s version uses some type of scaling to achieve the interactivity. What i want to do is to make an animation with masking. So at the end applications whole purpose to animate (show) the input from the microphone, no recording (it is not possible without flash media server).I attached a similar flash file to show what i exactly trying to achieve. any leads appreciated !!!

cheers!!!