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Access a Users Microphone and Create a Sound Display

<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="vertical">     <mx:VBox width="400" height="300" creationComplete="createMic()">          <mx:Script>                  import flash.media.Microphone;         import flash.events.ActivityEvent;         import flash.events.Event;         import mx.controls.Alert;         import flash.events.StatusEvent;                public var mic:Microphone;                public function createMic():void           {             mic = Microphone.getMicrophone();             mic.setLoopBack(true);             mic.addEventListener(ActivityEvent.ACTIVITY, activity);             mic.addEventListener(StatusEvent.STATUS, status);             mic.addEventListener(Event.ACTIVATE, active);           }                private function active(event:Event):void           {             Alert.show('active');           }                private function status(event:StatusEvent):void           {             Alert.show("status");           }                private function activity(event:ActivityEvent):void           {             addEventListener(Event.ENTER_FRAME, showMicLevel);           }                private function showMicLevel(event:Event):void           {             Alert.show(mic.gain+" "+mic.activityLevel+" "+mic.silenceLevel+" "+mic.rate);             level.graphics.clear();             level.graphics.beginFill(0xccccff, 1);             level.graphics.drawRect(0, 0, (mic.activityLevel * 30), 100);             level.graphics.endFill();           }                 </mx:Script>     <mx:Canvas width="300" height="50" id="level"/>     </mx:VBox> </mx:Application>