(FlashCS4) Help on how to edit movie on mic input

Hello,

I’ve been using Kirupa tutorials to do some things in flash - I made the “snow” movie animation with AS 2.0.

It’s working perfectly, but how could I ask it to change when there is microphone input at a certain level? And then I’d insert new different code (?) for the snow flakes to blow away in the wind.

I’ve had a bit of trouble locating a tutorial on this and any help would be really appreciated - even if you just know where a tutorial is on this.