actionscript-3 - 使用Actionscript 3.0淡入声音

Question

我已经使用以下代码和GreenSock插件设法淡出了声音:

import com.greensock.TweenLite;
import com.greensock.TweenMax;

var snd = new buller();
var channel:SoundChannel = snd.play(0,999);

TweenMax.to(channel, 1, {volume:0, onComplete:snd.stop});

我无法做的是逐渐减弱声音。尝试设置初始声音级别，但无法使其正常工作。感谢我能得到的任何帮助。

Answer 1

var snd = new buller();
var channel:SoundChannel = new SoundChannel();
var St::SoundTransform = new SoundTransform();
var TimerFade:Timer = new Timer(1,100);

//set the initial sound volume
St.volume = 1;

//play the sound
channel = snd.play(0,0,St);

//Fade in/out the sound
TimerFade.addEventListener(TimerEvent.TIMER,VolumeHandler);
TimerFade.addEventListener(TimerEvent.TIMER_COMPLETE,StopSound);
TimerFade.start();


private function VolumeHandler(e:TimerEvent):void{
  var Lastpos:Number = channel.position;
  channel.stop();
  St.volume -= 0.1;
  channel = snd.play(Lastpos,0,St);
}

private function VolumeHandler(e:TimerEvent):void{
  channel.stop();
}