geuni

package
{
import flash.display.Bitmap;
import flash.display.BitmapData;
import flash.display.Sprite;
import flash.events.Event;
import flash.media.SoundMixer;
import flash.media.Sound;
import flash.net.URLRequest;
import flash.utils.ByteArray;
import flash.geom.Rectangle;

public class Spectrum extends Sprite
{
private var _sound:Sound;
private var _spectrumGraph:BitmapData;
public function Spectrum()
{
  //비트맵 테이터와 사운드 오브젝트의 생성이 이루어집니다.
  _spectrumGraph = new BitmapData(200,60,false,0xFFFFFF);
  var bitmap:Bitmap = new Bitmap(_spectrumGraph);
  addChild(bitmap);
//사운드 객체 생성
_sound = new Sound(new URLRequest("MySound.mp3"));
  _sound.play();
  addEventListener(Event.ENTER_FRAME, onEnterFrame);
}
public function onEnterFrame(event:Event):void
{
  var spectrum:ByteArray = new ByteArray();
  var rect:Rectangle = new Rectangle(0, 0, 200, 60);
  SoundMixer.computeSpectrum(spectrum);
  _spectrumGraph.fillRect(rect,0xCCCCCC);
  //좌측 스펙트럼
  for(var i:int = 0; i<256; i++ )
  {
  _spectrumGraph.setPixel32(i,20+spectrum.readFloat()*20,0xffffffff)
  }
  //우측 스펙트럼
  for(var j:int = 0; j<256; j++ )
  {
_spectrumGraph.setPixel32(j,40+spectrum.readFloat()*20,0xffffffff);
  }
}  
}
}