flashでマイクを使うテスト

MicTest.as

// MicTest.as
package {
    import flash.display.*;
    import flash.events.*;
    import flash.media.*;
    import flash.net.*;
    import flash.system.Security;
    import flash.system.SecurityPanel;

    public class MicTest extends Sprite {
        private var _mic:Microphone;
        private var _circle:Sprite;

        public function MicTest() {
            log("foo");
            _mic = Microphone.getMicrophone();
            if (_mic != null) {
                _mic.rate = 44;
                _mic.setSilenceLevel(10);
                _mic.setLoopBack(true);
                _mic.setUseEchoSuppression(true);
                _mic.addEventListener(ActivityEvent.ACTIVITY, activityHandler);
                _mic.addEventListener(StatusEvent.STATUS, statusHandler);
//            var soundTransform:SoundTransform = _mic.soundTransform;
//            soundTransform.volume = 0;
//            _mic.soundTransform = soundTransform;

                this.addEventListener(Event.ENTER_FRAME, onEnterFrame);
            } else {
                log("bar");
            }

            _circle = new Sprite();
            this.addChild(_circle);
        }

        private function activityHandler(event:ActivityEvent):void {
            log("activityHandler: " + event);
        }

        private function statusHandler(event:StatusEvent):void {
            log("statusHandler: " + event);
        }

        public function onEnterFrame(event:Event):void
        {
//            log(_mic.activityLevel);

            _circle.graphics.clear();
            var lineWeight:Number = 3;
            var rate:Number = 2;
            var level:Number = _mic.activityLevel * rate;
            var center:Number = 100 * rate;
            if (level > 90) {
                _circle.graphics.lineStyle(lineWeight, 0xff0000);
            } else if (level > 50) {
                _circle.graphics.lineStyle(lineWeight, 0xffff00);
            } else {
                _circle.graphics.lineStyle(lineWeight, 0x00ff00);
            }
//            _circle.scaleX = _circle.scaleY = _mic.activityLevel * 0.1;
        }
    }
}