package{	//引入相关的类	import flash.display.Sprite;	import flash.display.Graphics;	import flash.media.Sound;	import flash.media.SoundChannel;	import flash.media.SoundMixer;	import flash.net.URLRequest;	import flash.events.Event;	import flash.utils.ByteArray;		//自定义wave类，实现相关操作	public class wave extends Sprite	{		//定义所需变量		private var sound:Sound;		private var ba:ByteArray;		private var num:Number;		private var sound_channel:SoundChannel;		private var t:Number=0;				public function wave()		{			sound=new Sound();			ba=new ByteArray();			sound.load(new URLRequest("test.mp3"));			sound_channel=sound.play();			//添加事件侦听，用spectrum函数处理			this.addEventListener(Event.ENTER_FRAME,spectrum);		}		//侦听处理函数，调用绘制波形函数		private function spectrum(event:Event)		{			graphics.clear();			drawFunction(1,0xbb11aa);					}		//绘制波形主函数		private function drawFunction(thickness:Number,color:Number)		{			graphics.lineStyle(thickness,color,100);			//获取当前声音频谱信息			SoundMixer.computeSpectrum(ba,false,0);			//绘制声波曲线			for(var i=30;i<=stage.stageWidth-30;i++)			{				//以浮点形式读出当前声音频谱信息				num=ba.readFloat()*360;				if(i>30)				{					var fi=stage.stageHeight/2+num;					graphics.lineTo(i,fi);				}				else				{					trace(i);					graphics.moveTo(30,stage.stageHeight/2+num);				}			}		}	}}