Crash when switching to PCM.

[bartoszek]

SWYH works find for me when using MP3 stream, but when trying to switch to PCM it cashes.
source={thinkpad:w530,SWYH:1.5.0+27e8167,windows_10:v2004};sink={yamaha:R-N602}
crash.log

Date: 08.11.2020 20:05:49
Message: Object reference not set to an instance of an object.
Detail: System.NullReferenceException: Object reference not set to an instance of an object.
   w SWYH.SettingsWindow.btValid_Click(Object sender, RoutedEventArgs e)
   w System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised)
   w System.Windows.UIElement.RaiseEventImpl(DependencyObject sender, RoutedEventArgs args)
   w System.Windows.Controls.Primitives.ButtonBase.OnClick()
   w System.Windows.Controls.Button.OnClick()
   w System.Windows.Controls.Primitives.ButtonBase.OnMouseLeftButtonUp(MouseButtonEventArgs e)
   w System.Windows.RoutedEventArgs.InvokeHandler(Delegate handler, Object target)
   w System.Windows.RoutedEventHandlerInfo.InvokeHandler(Object target, RoutedEventArgs routedEventArgs)
   w System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised)
   w System.Windows.UIElement.ReRaiseEventAs(DependencyObject sender, RoutedEventArgs args, RoutedEvent newEvent)
   w System.Windows.UIElement.OnMouseUpThunk(Object sender, MouseButtonEventArgs e)
   w System.Windows.RoutedEventArgs.InvokeHandler(Delegate handler, Object target)
   w System.Windows.RoutedEventHandlerInfo.InvokeHandler(Object target, RoutedEventArgs routedEventArgs)
   w System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised)
   w System.Windows.UIElement.RaiseEventImpl(DependencyObject sender, RoutedEventArgs args)
   w System.Windows.UIElement.RaiseTrustedEvent(RoutedEventArgs args)
   w System.Windows.Input.InputManager.ProcessStagingArea()
   w System.Windows.Input.InputManager.ProcessInput(InputEventArgs input)
   w System.Windows.Input.InputProviderSite.ReportInput(InputReport inputReport)
   w System.Windows.Interop.HwndMouseInputProvider.ReportInput(IntPtr hwnd, InputMode mode, Int32 timestamp, RawMouseActions actions, Int32 x, Int32 y, Int32 wheel)
   w System.Windows.Interop.HwndMouseInputProvider.FilterMessage(IntPtr hwnd, WindowMessage msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
   w System.Windows.Interop.HwndSource.InputFilterMessage(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
   w MS.Win32.HwndWrapper.WndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
   w MS.Win32.HwndSubclass.DispatcherCallbackOperation(Object o)
   w System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)
   w System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Int32 numArgs, Delegate catchHandler)
   w System.Windows.Threading.Dispatcher.LegacyInvokeImpl(DispatcherPriority priority, TimeSpan timeout, Delegate method, Object args, Int32 numArgs)
   w MS.Win32.HwndSubclass.SubclassWndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam)
   w MS.Win32.UnsafeNativeMethods.DispatchMessage(MSG& msg)
   w System.Windows.Threading.Dispatcher.PushFrameImpl(DispatcherFrame frame)
   w System.Windows.Application.RunDispatcher(Object ignore)
   w System.Windows.Application.RunInternal(Window window)
   w SWYH.App.Main()
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On my Linux box PCM streaming to Yamaha amp works fine (with pulseaudio-dlna)

[bartoszek]

Ok, I manage to fix it - have to select "default" source first.
Now my Yamaha says Unsupported format 😕