如何在WP8中播放异步声音效果？

Question

我有一个使用XNA Sound Effect运行的乐器应用程序。我的问题是; 当我播放另一个正在播放的声音效果时，最后一个正在杀死第一个声音效果。这不是我想要的，我想异步播放声音，即使它们也是同样的声音。我该怎么办呢？

感谢您的帮助。

  public static SoundEffectInstance passSound;
  public static SoundEffect passSound;


  LoadSoundInstance("Assets/SoundEffects/passSound.wav", out passSound, out passSoundInstance);


  private void LoadSound(String SoundFilePath, out SoundEffect Sound)
    {
        // For error checking, assume we'll fail to load the file.
        Sound = null;

        try
        {
            // Holds informations about a file stream.
            StreamResourceInfo SoundFileInfo = App.GetResourceStream(new Uri(SoundFilePath, UriKind.Relative));

            // Create the SoundEffect from the Stream
            Sound = SoundEffect.FromStream(SoundFileInfo.Stream);
        }
        catch (NullReferenceException)
        {
            // Display an error message
            MessageBox.Show("Couldn't load sound " + SoundFilePath);
        }
    }

    private void LoadSoundInstance(String SoundFilePath, out SoundEffect Sound, out SoundEffectInstance SoundInstance)
    {
        // For error checking, assume we'll fail to load the file.
        Sound = null;
        SoundInstance = null;

        try
        {
            LoadSound(SoundFilePath, out Sound);
            SoundInstance = Sound.CreateInstance();
        }
        catch (NullReferenceException)
        {
            // Display an error message
            MessageBox.Show("Couldn't load sound instance " + SoundFilePath);
        }
    }

我只在玩游戏时使用它;

   public void PlaySound(SoundEffectInstance sound)
    {
        sound.Play();
    }

如果我在播放相同的声音时调用PlaySound方法，则不会播放新的声音。