mp3波形器

as3可以把声音解析成二进制，并加以分析。结合ｐｖ３ｄ，做了个例子～

package
{

import flash.events.Event;
import flash.media.Sound;
import flash.media.SoundChannel;
import flash.media.SoundMixer;
import flash.net.URLRequest;
import flash.utils.ByteArray;

import org.papervision3d.lights.PointLight3D;
import org.papervision3d.materials.shadematerials.PhongMaterial;
import org.papervision3d.materials.utils.MaterialsList;
import org.papervision3d.objects.DisplayObject3D;
import org.papervision3d.objects.primitives.Cube;
import org.papervision3d.view.BasicView;

[SWF(backgroundColor=0x000000)]
public class Sound3D extends BasicView
{
    private var universe:DisplayObject3D;
    private var cubesArray:Array;
    
    private var bgm:Sound;
    private var bgmChannel:SoundChannel;
    private var ba:ByteArray;
    private var num:Number;
    private var myBlockArray:Array;
    private var smallBlockArray:Array;
    private var ready:Boolean=false;
    public function Sound3D()
    {
        init3D();            
    }
    private function init3D():void
    {
        cubesArray=[];
        smallBlockArray=[];
        universe=new DisplayObject3D();
        //camera.z=500;
        camera.zoom=80;
        scene.addChild(universe);
        var light:PointLight3D=new PointLight3D();
        for(var i:uint=0;i<20;i++)
        {
            var mt:PhongMaterial=new PhongMaterial(light,0xff0000,0x220000,3);
            var ml:MaterialsList=new MaterialsList({all:mt });
            var cube:Cube=new Cube(ml,30,30,200);
            
            var cubeSmall:Cube=new Cube(ml,30,30,10);
            
            //cube.x=15*i-30*15/2;
            cubeSmall.rotationY=cube.rotationY=18*i;

            cube.moveForward(200);
            cubeSmall.moveForward(200);
            cubeSmall.y=250;
            
            var cubeHolder:DisplayObject3D=new DisplayObject3D();
            cube.y=100;
            cubeHolder.addChild(cube);
            cubesArray.push(cubeHolder);
            smallBlockArray.push(cubeSmall);
            
            universe.addChild(cubeHolder);
            universe.addChild(cubeSmall);
            
            
        }
        ready=true;
        initSound();
        startRendering();
    }
    private function initSound():void
    {
        bgm = new Sound();
        ba = new ByteArray();
        bgm.load(new URLRequest('../lib/where-is-the-love.mp3'));
        bgmChannel = bgm.play();    
    }
    override protected function onRenderTick(event:Event=null):void
    {
        super.onRenderTick();
        universe.rotationY=viewport.containerSprite.mouseX/10;
        universe.y=viewport.containerSprite.mouseY;
        
        drawFunction();
        
    }

    private function drawFunction():void
    {
        //获取音谱信息
        SoundMixer.computeSpectrum(ba, true, 0);
        trace(ba.length);
        if(ready)
        {
            for (var i:uint = 0; i < 20; i++)
            {
                if(cubesArray[i].scaleY<.1)
                {
                    cubesArray[i].alpha=0;
                }
                else
                {
                    cubesArray[i].alpha=.5;
                }
                cubesArray[i].scaleY = ba.readFloat();
                if(cubesArray[i].scaleY*200>smallBlockArray[i].y)
                {
                    smallBlockArray[i].y=cubesArray[i].scaleY*200;
                }
                smallBlockArray[i].y-=10;
                if(smallBlockArray[i].y<5)
                {
                    smallBlockArray[i].y=5;
                }
                
            }
        }
    }
}

}
本文转自jiahuafu博客园博客，原文链接http://www.cnblogs.com/jiahuafu/archive/2009/09/30/1577015.html如需转载请自行联系原作者

jiahuafu