Make an object react to a sound in Flash

I have a speaker and I need this speaker moves with a sound. I need to simulate the real world speaker vibration generated by the low and mid frequencies.

Does not have to be 开发者_高级运维soo realistic what I whant to know is how I can play a sound and get son mumerical value usefull for apply numerical size transformation to the speaker.

Cheers!

You can detect the amplitude of a sound in AS3 using the SoundMixer.leftPeak and SoundMixer.rightPeak methods: there's a nice example here...