ActionScript3.0 サウンド

package{
  import flash.display.Loader;
  import flash.display.Sprite;
  import flash.media.Sound;
  import flash.display.BitmapData;
  import flash.events.Event;
  import flash.events.ProgressEvent;
  import flash.net.URLRequest;
  import flash.text.TextField;

[SWF(width="300", height="200", backgroundColor="0xFFFFFF")]

  public class Main extends Sprite 
  {
    private var text_field:TextField;
    private var sound_obj:Sound;

    public function Main():void
    {
      // テキストフィールドの準備
      text_field = new TextField();
      text_field.x = 0;              // x 座標
      text_field.y = 0;              // y 座標
      text_field.width = 300;        // 幅
      text_field.height = 200;       // 高さ
      addChild(text_field);

      var url:URLRequest = new URLRequest("http://mniwa.web.fc2.com/mp3/song_b.mp3");
      sound_obj  = new Sound(url);

      sound_obj.addEventListener(Event.OPEN,SoundOpenFunc);
      sound_obj.addEventListener(ProgressEvent.PROGRESS,SoundProgressFunc);
      sound_obj.addEventListener(Event.COMPLETE,SoundCompleteFunc);
    }

    private function SoundOpenFunc(e:Event):void
    {
      text_field.appendText("onOpen : ロード開始\n");
    }

    private function SoundProgressFunc(e:ProgressEvent):void
    {
      text_field.appendText("onProgress : ");
      text_field.appendText(e.bytesTotal + " バイト中 ");
      text_field.appendText(e.bytesLoaded + " バイト読み込み完了\n");
    }

    private function SoundCompleteFunc(e:Event):void
    {
      text_field.appendText("onComplete : ロード完了\n");

      sound_obj.play();
    }
  }
}