diff -r 000000000000 -r bde4ae8d615e os/mm/mm_plat/global_audio_settings_api/inc/MGlobalAudioSettingsObserver.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/os/mm/mm_plat/global_audio_settings_api/inc/MGlobalAudioSettingsObserver.h	Fri Jun 15 03:10:57 2012 +0200
@@ -0,0 +1,74 @@
+/*
+* Copyright (c) 2004 Nokia Corporation and/or its subsidiary(-ies). 
+* All rights reserved.
+* This component and the accompanying materials are made available
+* under the terms of "Eclipse Public License v1.0"
+* which accompanies this distribution, and is available
+* at the URL "http://www.eclipse.org/legal/epl-v10.html".
+*
+* Initial Contributors:
+* Nokia Corporation - initial contribution.
+*
+* Contributors:
+*
+* Description:  This file contains definitions of GlobalAudioSettings observer.
+*
+*/
+
+
+
+#ifndef MGLOBALAUDIOSETTINGSOBSERVER_H
+#define MGLOBALAUDIOSETTINGSOBSERVER_H
+
+// CONSTANTS
+
+// CLASS DECLARATION
+
+/**
+ *  An interface to Global Audio Settings observer callback functions.
+ *
+ *  This serves as the method of communication between the client and the
+ *  CGlobalAudioSettings object.
+ *
+ *  The class is a mixin and is intended to be inherited by the client class
+ *  that is interested in observing the global audio settings. The functions
+ *  encapsulated by this class are called when events occur which causes device
+ *  audio settings to be changed that affects the overall audio behavior.
+ *
+ *  @lib GlobalAudioSettings.lib
+ *  @since 3.2
+ */
+class MAudioSettingsObserver
+    {
+public:
+    enum TGASEventId
+        {
+          EGASWarningTones,
+          EGASMessageTones,
+          EGASSilentProfile,
+          EGASVibra,
+          EGASMessageToneName,
+          EGASEmailToneName,
+          EGASRingingType,
+          EGASVideoCallToneName,
+          EGASRingingTone1Name,
+          EGASRingingTone2Name,
+          EGASKeyPadVolume,
+          EGASSilenceMode
+        };
+
+public:
+    /**
+    * Invoked by the Global Audio Settings object when audio setting has changed.
+    *
+    * @since 3.2
+    * @param CGlobalAudioSettings& A reference to Global Audio Settings object
+    *   which invoked the callback.
+    * @param aSetting Specific id of the audio setting that changed.
+    */
+    virtual void SettingsChanged(CGlobalAudioSettings& aGlobalAudioSettings, TGASEventId aSetting) = 0;
+    };
+
+#endif      // MGLOBALAUDIOSETTINGSOBSERVER_H
+
+// End of File