added friendly name for device to MMDevice courtesy of contribution from Max

NAudio/CoreAudioApi/MMDevice.cs

@@ -135,7 +135,7 @@ namespace NAudio.CoreAudioApi
         }
 
         /// <summary>
-        /// Friendly name
+        /// Friendly name for the endpoint
         /// </summary>
         public string FriendlyName
         {
@@ -154,6 +154,27 @@ namespace NAudio.CoreAudioApi
             }
         }
 
+       /// <summary>
+       /// Friendly name of device
+       /// </summary>
+        public string DeviceFriendlyName
+        {
+            get
+            {
+                if (_PropertyStore == null)
+                {
+                    GetPropertyInformation();
+                }
+                if (_PropertyStore.Contains(PropertyKeys.PKEY_Device_FriendlyName))
+                {
+                    return (string)_PropertyStore[PropertyKeys.PKEY_Device_FriendlyName].Value;
+                }
+                else
+                {
+                    return "Unknown";
+                }
+            }
+        }
 
         /// <summary>
         /// Device ID

NAudio/CoreAudioApi/PropertyKeys.cs

@@ -66,6 +66,9 @@ namespace NAudio.CoreAudioApi
         /// PKEY_AudioEngine_DeviceFormat 
         /// </summary>
         public static readonly Guid PKEY_AudioEngine_DeviceFormat = new Guid(0xf19f064d, 0x82c, 0x4e27, 0xbc, 0x73, 0x68, 0x82, 0xa1, 0xbb, 0x8e, 0x4c);
-
+        /// <summary>
+        /// PKEY _Devie_FriendlyName
+        /// </summary>
+        public static readonly Guid PKEY_Device_FriendlyName = new Guid(0x026e516e, 0xb814, 0x414b, 0x83, 0xcd, 0x85, 0x6d, 0x6f, 0xef, 0x48, 0x22);
     }
 }