When I try to use WriteMonkey 2.01 on VirtualBox, I got an error like the following; See the end of this message for details on invoking just-in-time (JIT) debugging instead of this dialog box. ************** Exception Text ************** System.Exception: irrKlang device could not be created with the specified parameters. at IrrKlang.ISoundEngine.createSoundEngine(SoundOutputDriver driver, SoundEngineOptionFlag options, String deviceID) at IrrKlang.ISoundEngine..ctor() at Sheet.Form1..ctor(String[] args, String writerName) at Sheet.Splash.TimerTick(Object sender, EventArgs e) at System.Windows.Forms.Timer.OnTick(EventArgs e) at System.Windows.Forms.Timer.TimerNativeWindow.WndProc(Message& m) at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam) Then I installed WriteMonkey 0.99, and it worked without any error messages.