我正在使用Windows Phone应用程序,并遇到以下问题。我有一个可以打开或关闭背景音乐的循环.Wav文件。附加声音效果(例如Sound1)可以在按下按钮时播放。当背景音乐关闭时,音效效果会很好。但是,当背景音乐开启时,按钮按下和音效之间会有轻微的(但非常明显的)延迟。有什么我可以编程方式来避免这种情况?根据MSDN网站http://msdn.microsoft.com/en-us/library/ff431744%28v=vs.92%29.aspx的建议,我设置了一个dispatcherTimer来每50ms调用一次FrameworkDispatcher.Update。但是,这似乎没有太多帮助...我已经粘贴了一些我的代码。还有什么我可以做的,以摆脱这种滞后?使用SoundEffect播放同步音频片段时出现延迟
public partial class Modules : PhoneApplicationPage
{
static SoundEffectInstance loopedSound = null;
static SoundEffectInstance sound1=null;
double pitchValue = 4.0;
static double pitchAdjust = 0.0;
public Modules()
{
InitializeComponent();
// Timer to simulate the XNA game loop (SoundEffect classes are from the XNA Framework)
DispatcherTimer XnaDispatchTimer = new DispatcherTimer();
XnaDispatchTimer.Interval = TimeSpan.FromMilliseconds(50);
XnaDispatchTimer.Tick += delegate { try { FrameworkDispatcher.Update(); } catch { } };
XnaDispatchTimer.Start();
}
private void playButton_Click(object sender, RoutedEventArgs e)
{
if (loopedSound!=null)
loopedSound.Dispose();
SoundEffect sound = SoundEffect.FromStream(Application.GetResourceStream(new Uri(@"BackgroundSound.wav", UriKind.Relative)).Stream);
LoopClip(sound);
}
private void stopButton_Click(object sender, RoutedEventArgs e)
{
loopedSound.Stop();
}
static protected void LoopClip(SoundEffect soundEffect)
{
loopedSound = soundEffect.CreateInstance();
loopedSound.IsLooped = true;
loopedSound.Pitch = (float) pitchAdjust;
loopedSound.Play();
}
static protected void sound1Clip(SoundEffect soundEffect)
{
sound1 = soundEffect.CreateInstance();
sound1.IsLooped = false;
sound1.Play();
}
private void Sound1Button_Click(object sender, RoutedEventArgs e)
{
if (sound1 == null)
{
SoundEffect sound = SoundEffect.FromStream(Application.GetResourceStream(new Uri(@"sound1.wav", UriKind.Relative)).Stream);
sound1Clip(sound);
}
if (sound1 != null)
{
sound1.Play();
}
}
}
}
我一直认为,有一个基本问题,使同步视频和音频近似练习..我会有兴趣,看看有人知道.. – 2011-04-23 20:59:39