apache-flex - 弹性 : how to change the volume of an EMBEDDED sound?

Question

搜索如何改变声音的音量，我总是很烦snd=new Sound(URLRequest) ，后跟 snd.setVolume(val) .哦，很好，但我的声音不是 URLRequest，而是嵌入。

我做了很多随机尝试(1)无济于事。我应该怎么做呢？

(1) 包括将我的类转换为 Sound，使用 embed 类作为参数创建 Sound，创建 SoundTransform 并将其设置为 channel 等。

Answer 1

像这样实例化您的嵌入式类:

[Embed(source="MySound.mp3")]
public var soundClass:Class;


protected function application1_creationCompleteHandler(event:FlexEvent):void
{
    var smallSound:Sound = new soundClass() as Sound;
    var trans:SoundTransform = new SoundTransform(.01);
    smallSound.play(0,0,trans);
}

更新:

如果您真正想知道的是如果声音已经在播放，如何更改音量:

[Embed(source="MySound.mp3")]
public var soundClass:Class;
public var smallSound : Sound;
public var vol : Number = 0.01;
public var trans : SoundTransform;

public var chan : SoundChannel = new SoundChannel();

protected function application1_creationCompleteHandler(event:FlexEvent):void {
    smallSound = new soundClass() as Sound;
    trans = new SoundTransform(vol);
    chan = smallSound.play(0,0,trans);
}

protected function volUp_clickHandler(event:MouseEvent):void {
    vol += .1;
    trans = new SoundTransform(vol);

    chan.soundTransform = trans;
}