New Post: Loud noise at the beginnig and at at the end of a stream with WaveOut.Play()

I did not know about the BufferedStreamWaveprovider. Now it is working properly. Thank you very much markheath!
Let me ask an another question. I enhanced my project with the BufferedStreamWaveprovider. Now I hear three high-pitched sound after the WaveOut.Play(). With a Thread.Sleep(500) immediately after WaveOut.Play() solves the problem, but does a proper solution exist about this problem?