Flash mp3播放停止回音，as3

多次点击play，会产生回声，我无法停止mp3播放器。 mp3播放的最佳实践是什么

            var mySound:Sound = new Sound();
    playButton.addEventListener (MouseEvent.CLICK, myPlayButtonHandler);
            var myChannel:SoundChannel = new SoundChannel();

            function myPlayButtonHandler (e:MouseEvent):void {
                    myChannel = mySound.play();
                            }
    stopButton.addEventListener(MouseEvent.CLICK, onClickStop);
            function onClickStop(e:MouseEvent):void{
                            myChannel.stop();
                            }

---

我会做几件事

一旦播放被点击，在变量中记录该状态。如果他们再次点击播放，如果你已经处于“播放”状态，不要做任何事情

另一种选择：

---

2.将“播放”按钮更改为“暂停”按钮。如果按下按钮，则执行停止操作。如果他们点击暂停，则将按钮切换回播放状态。

这里有两个按钮可全局控制音量。如果这不起作用，请告诉我

var mySound:Sound = new Sound();
playButton.addEventListener (MouseEvent.CLICK, myPlayButtonHandler);
var myChannel:SoundChannel = new SoundChannel();
        function myPlayButtonHandler (e:MouseEvent):void {

            myChannel = mySound.play();
            }
stopButton.addEventListener(MouseEvent.CLICK, onClickStop);
        function onClickStop(e:MouseEvent):void{
            myChannel.stop();
            }

/*-----------------------------------------------------------------*/
//global sound buttons, add instance of 'killswitch' and 'onswitch' to stage
killswitch.addEventListener(MouseEvent.CLICK, clipKillSwitch); 
        function clipKillSwitch(e:MouseEvent):void{ 
var transform1:SoundTransform=new SoundTransform();
transform1.volume=0;
flash.media.SoundMixer.soundTransform=transform1;
            }       
onswitch.addEventListener(MouseEvent.CLICK, clipOnSwitch); 
        function clipOnSwitch(e:MouseEvent):void{ 
var transform1_:SoundTransform=new SoundTransform();        
transform1_.volume=1;
flash.media.SoundMixer.soundTransform=transform1_;      
            }