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diff --git a/demos/mobile/quickhit/ga_src/GEInterfaces.cpp b/demos/mobile/quickhit/ga_src/GEInterfaces.cpp
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+++ b/demos/mobile/quickhit/ga_src/GEInterfaces.cpp
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+/******************************************************************************
+ *
+ * Copyright (c) 2011 Nokia Corporation and/or its subsidiary(-ies).
+ * All rights reserved.
+ * Contact: Nokia Corporation (qt-info@nokia.com)
+ *
+ * $QT_BEGIN_LICENSE:BSD$
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in the
+ *       documentation and/or other materials provided with the distribution.
+ *     * Neither the name of the author organization nor the
+ *       names of its contributors may be used to endorse or promote products
+ *       derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * $QT_END_LICENSE$
+ *
+ *****************************************************************************/
+
+#include <memory.h>
+#include "GEInterfaces.h"
+
+
+using namespace GE;
+
+/**
+ * CAudioSource
+ * common functionality
+ *
+ */
+IAudioSource::IAudioSource() {
+    m_next = 0;
+};
+
+IAudioSource::~IAudioSource() {
+
+
+};
+
+/**
+ * CAudioMixer
+ *
+ */
+CAudioMixer::CAudioMixer() {
+    m_sourceList = 0;
+    m_mixingBuffer = 0;
+    m_mixingBufferLength = 0;
+    m_fixedGeneralVolume = 4096;
+};
+
+
+CAudioMixer::~CAudioMixer() {
+    destroyList();
+    if (m_mixingBuffer) {
+        delete [] m_mixingBuffer;
+        m_mixingBuffer = 0;
+    };
+};
+
+void CAudioMixer::destroyList() {
+    m_mutex.lock();
+    IAudioSource *l = m_sourceList;
+    while (l) {
+        IAudioSource *n = l->m_next;
+        delete l;
+        l = n;
+    };
+    m_sourceList = 0;
+    m_mutex.unlock();
+};
+
+
+IAudioSource* CAudioMixer::addAudioSource( IAudioSource *source ) {
+    m_mutex.lock();
+    source->m_next = 0;
+    if (m_sourceList) {
+        IAudioSource *l = m_sourceList;
+        while (l->m_next) l = l->m_next;
+        l->m_next = source;
+    } else m_sourceList = source;
+    m_mutex.unlock();
+    return source;
+
+};
+
+
+bool CAudioMixer::removeAudioSource( IAudioSource *source ) {
+    return true;
+};
+
+void CAudioMixer::setGeneralVolume( float vol ) {
+    m_fixedGeneralVolume = (4096.0f*vol);
+};
+
+int CAudioMixer::pullAudio( AUDIO_SAMPLE_TYPE *target, int bufferLength ) {
+
+    if (!m_sourceList) return 0;
+
+    m_mutex.lock();
+
+
+    if (m_mixingBufferLength<bufferLength) {
+        if (m_mixingBuffer) delete [] m_mixingBuffer;
+        m_mixingBufferLength = bufferLength;
+        m_mixingBuffer = new AUDIO_SAMPLE_TYPE[ m_mixingBufferLength ];
+    };
+
+    memset( target, 0, sizeof( AUDIO_SAMPLE_TYPE ) * bufferLength );
+
+    AUDIO_SAMPLE_TYPE *t;
+    AUDIO_SAMPLE_TYPE *t_target;
+    AUDIO_SAMPLE_TYPE *s;
+
+    IAudioSource *prev = 0;
+    IAudioSource *l = m_sourceList;
+    while (l) {
+        IAudioSource *next = l->m_next;
+
+            // process l
+        int mixed = l->pullAudio( m_mixingBuffer, bufferLength );
+        if (mixed>0) {
+            // mix to main..
+            t = target;
+            t_target = t+mixed;
+            s = m_mixingBuffer;
+            while (t!=t_target) {
+                *t +=(((*s)*m_fixedGeneralVolume)>>12);
+                t++;
+                s++;
+            };
+        };
+
+
+
+        // autodestroy
+        if (l->canBeDestroyed() == true) {          // NOTE, IS UNDER TESTING,... MIGHT CAUSE UNPREDICTABLE CRASHING WITH SOME USE CASES!!!
+            if (!prev)
+                m_sourceList = next;
+            else prev->m_next = next;
+            delete l;
+            l = 0;
+        };
+
+
+
+
+        prev = l;
+        l = next;
+    };
+    m_mutex.unlock();
+    return bufferLength;
+};
+
+
+
+