diff -r 000000000000 -r b8ed18f6c07b devsoundextensions/effects/DistAtten/DistanceAttenuationProxy/Src/MDistanceAttenuationCallback.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/devsoundextensions/effects/DistAtten/DistanceAttenuationProxy/Src/MDistanceAttenuationCallback.h	Thu Oct 07 22:34:12 2010 +0100
@@ -0,0 +1,50 @@
+/*
+* 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:  Interface for distnace attenuation callback
+*
+*/
+
+
+
+
+#ifndef MDISTANCEATTENUATIONCALLBACK_H
+#define MDISTANCEATTENUATIONCALLBACK_H
+
+//  INCLUDES
+
+// CLASS DECLARATION
+
+
+/**
+*  Interface class to be implemented by objects that receives callbacks from DistanceAttenuation Event Observer.
+*
+*  @since 3.0
+*/
+class MDistanceAttenuationCallback
+    {
+    public:
+
+        /**
+        * Invoked by the Distance Attenuation Event Observer when the DistanceAttenuation object changes state
+        * @since 3.0
+        * @param aBuffer Buffer containing the distance attenuation data
+        */
+        virtual void DistanceAttenuationEvent( TDesC8& aDataPckg ) = 0;
+    };
+
+
+
+#endif      // MDISTANCEATTENUATIONCALLBACK_H
+
+// End of File