[HOW-TO] Control the video volume in AS3?

1

Hi All ~
Here is the code for video in AS3:

 
var nc:NetConnection = new NetConnection();
nc.connect(null);
var ns:NetStream = new NetStream(nc); 
var vid:Video = new Video(320, 240);
this.addChild(vid); 
vid.attachNetStream(ns);
ns.play("test.flv");

The question is …
[COLOR=darkorange]If I want to control the volume, how can it be done in AS3??[/COLOR]
Thanks ~