WaveOut versus WaveOutEvent

问题

I'm using NAudio with

WaveOutEvent Klangwiedergabegeraet;

private void Play(string Dateiname)
{
    Klangwiedergabegeraet = new WaveOutEvent();
    Klangwiedergabegeraet.DeviceNumber = comboBox1.SelectedIndex;
    ISampleProvider StueckchenHalter = null;
    StueckchenHalter = CreateInputStreamS(Dateiname);
    Klangwiedergabegeraet.Init(new SampleToWaveProvider(StueckchenHalter));  
    Klangwiedergabegeraet.Play();
}

private void Cancel()
{
    if (Klangwiedergabegeraet != null)
    {
        Klangwiedergabegeraet.Stop();
        Klangwiedergabegeraet.Dispose();
    }
}

When running Cancel(), it won't stop. When I used

WaveOut Klangwiedergabegeraet;

private void Play(string Dateiname)
{
    Klangwiedergabegeraet = new WaveOut();
    ...
}

private void Cancel()
{
    if (Klangwiedergabegeraet != null)
    {
        Klangwiedergabegeraet.Stop();
        Klangwiedergabegeraet.Dispose();
    }
}

It worked. Why is this and what to change?

P.S I am using WaveOutEvent instead of WaveOut because WaveOut does not have the property DeviceNumber.

回答1:

If you are running on a non-GUI thread, then WaveOutEvent is the recommended way to do things, not WaveOut as that will choose function callbacks which can be unreliable on some soundcards. Also, WaveOut does have a DeviceNumber property.

来源：https://stackoverflow.com/questions/13208271/waveout-versus-waveoutevent