Actionscript 3 actionscript 3按键释放停止声音

嗨，我真的是一个新的动作脚本，我有一个问题，发挥声音。当我松开向上键时，我希望我的声音停止播放。我设法用按键播放声音

这是我的密码

import flash.events.KeyboardEvent;

var mySound:Sound = new carstart();

stage.addEventListener(KeyboardEvent.KEY_DOWN, playSound);
stage.addEventListener(KeyboardEvent.KEY_UP, stopSound);

function playSound(keyEvent:KeyboardEvent) {
    if (keyEvent.keyCode == 38) {
        mySound.play();
    }
}

function stopSound(keyEvent:KeyboardEvent) {
    if (keyEvent.keyCode == 38) {
     mySound.stop();
    }
}

我得到这个错误

Scene 1, Layer 'Actions', Frame 1, Line 29  1061: Call to a possibly undefined method stop through a reference with static type flash.media:Sound.

如果你能想到什么，那将是一个很大的帮助

---

谢谢

您需要将

声音

对象包装到

声音频道

。。。

---

按照这个例子，你很快就会被设置好

您需要将

声音

对象包装到

声音频道

。。。 按照这个例子，你很快就会被设置好

import flash.events.KeyboardEvent;

var mySound:Sound = new carstart();
var myChannel:SoundChannel = new SoundChannel();

myChannel = mySound.play();

function playSound(keyEvent:KeyboardEvent) {
    if (keyEvent.keyCode == 38) {
        mySound.play();
    }
}

function stopSound(keyEvent:KeyboardEvent) {
    if (keyEvent.keyCode == 38) {
     myChannel.stop();
    }
}