merge branch 'development' into feature-2.0.0/move-dm-to-library

src/PepperDash.Essentials.Core/Devices/IVolumeAndAudioInterfaces.cs

@@ -72,6 +72,10 @@ namespace PepperDash.Essentials.Core
     {
         IBasicVolumeControls CurrentVolumeControls { get; }
 		event EventHandler<VolumeDeviceChangeEventArgs> CurrentVolumeDeviceChange;
+
+        void SetDefaultLevels();
+
+        bool ZeroVolumeWhenSwtichingVolumeDevices { get; }
 	}