Sound Visualization sample 2(Wave plot)

/**
 * Copyright J2kawa ( http://wonderfl.net/user/J2kawa )
 * MIT License ( http://www.opensource.org/licenses/mit-license.php )
 * Downloaded from: http://wonderfl.net/c/4O89
 */

package {
    //Via "learning Action Script 3.0"
    //まだ超途中
    //Loadしたmp3ファイルを再生して波形表示
    
    import flash.display.*;
    import flash.geom.Point;
    import flash.net.*;
    import flash.utils.*;
    import flash.media.*;
    import flash.events.*;
    
    [SWF(width = "450", height = "450", backgroundColor=0xFFFFFF, frameRate="20")]

    public class SoundWave extends Sprite {
        private var sound:Sound = new Sound();
        private var sch:SoundChannel = new SoundChannel();
        private var waveView:Visualization;
        private var mp3src:String = "http://www.virtual-pop.com/music/sp10.mp3";
        
        public function SoundWave() {
            sound.addEventListener(Event.COMPLETE, onLoadComplete, false, 0, true);
            var context:SoundLoaderContext = new SoundLoaderContext(5000, false);
            sound.load(new URLRequest(mp3src), context);
        }
        
        private function onLoadComplete(evt:Event):void {
            removeEventListener(Event.COMPLETE, onLoadComplete);
            var waveObj:Object = new Object();
            waveObj.waveHeight = 150;
            waveObj.baseLine = 90;
            waveObj.visLoc = new Point(20,0);
            waveObj.visScale = 2;
            waveObj.fft = false;
            waveView = new Visualization( waveObj );
            addChild( waveView );
            waveView.stage.frameRate = 20;
        }
            
            
    }
}


import flash.display.*;
import flash.geom.Point;
import flash.media.SoundMixer;
import flash.utils.*;
import flash.events.*;

class Visualization extends Sprite{
    private var timer:Timer;
    private var bytes:ByteArray = new ByteArray();
    private var visLoc:Point;
    private var visScale:Number;
    private var waveHeight:Number;
    private var baseLine:Number;
    private var fft:Boolean;
    private var g:Graphics;
    
    public function Visualization( obj:Object ){
        waveHeight = obj.waveHeight;
        baseLine = obj.baseLine;
        visLoc = obj.visLoc;
        visScale = obj.visScale;
        
        
    }
    
    public function addVisTimer( ):void {
        if( timer==null ){
            timer = new Timer( 50 );
            timer.addEventListener( TimerEvent.TIMER, onVisualize );
            timer.start( );
        }
    }
    
    private function onVisualize( evt:TimerEvent ):void {
    }
        
            
}