mp3 Audio Visualization with rtmp streaming

Hi all,

     Am developing an application with Flex 4.5 & Flash Media Server. I need a visualization curresponding to the plaing track . It is possible with SoundMixer.computeSpectrum(bytes, true, 0) in case of progressive downloading. But not working with rtmp streaming. And also need audio wave curresponding to the track which is also working with progressive downloading usinf Sound object... Is there any way to make above both with rtmps treaming ?

Thank you

Jayakrishnan S