diff --git a/code/nel/include/nel/sound/audio_mixer_user.h b/code/nel/include/nel/sound/audio_mixer_user.h
index 1316fe34a..9c9fd5c86 100644
--- a/code/nel/include/nel/sound/audio_mixer_user.h
+++ b/code/nel/include/nel/sound/audio_mixer_user.h
@@ -230,6 +230,8 @@ public:
 	virtual uint				getSourcesInstanceCount() const { return (uint)_Sources.size(); }
 	/// Return the number of playing sources (slow)
 	virtual uint				getPlayingSourcesCount() const;
+	uint 						countPlayingSimpleSources() const; // debug
+	uint						countSimpleSources() const; // debug
 	/// Return the number of available tracks
 	virtual uint				getAvailableTracksCount() const;
 	/// Return the number of used tracks
diff --git a/code/nel/src/sound/audio_mixer_user.cpp b/code/nel/src/sound/audio_mixer_user.cpp
index 8bec4442c..1a6c2d322 100644
--- a/code/nel/src/sound/audio_mixer_user.cpp
+++ b/code/nel/src/sound/audio_mixer_user.cpp
@@ -221,6 +221,7 @@ void CAudioMixerUser::writeProfile(std::string& out)
 */
 	out += "Sound mixer: \n";
 	out += "\tPlaying sources: " + toString (getPlayingSourcesCount()) + " \n";
+	out += "\tPlaying simple sources: " + toString(countPlayingSimpleSources()) + " / " + toString(countSimpleSources()) + " \n";
 	out += "\tAvailable tracks: " + toString (getAvailableTracksCount()) + " \n";
 	out += "\tUsed tracks: " + toString (getUsedTracksCount()) + " \n";
 //	out << "\tMuted sources: " << nb << " \n";
@@ -270,7 +271,8 @@ void CAudioMixerUser::reset()
 
 	_SourceWaitingForPlay.clear();
 	
-	_MusicChannelFaders->reset();
+	for (uint i = 0; i < _NbMusicChannelFaders; ++i)
+		_MusicChannelFaders[i].reset();
 
 	// Stop tracks
 	uint i;
@@ -2173,6 +2175,32 @@ uint			CAudioMixerUser::getPlayingSourcesCount() const
 	return _PlayingSources;
 }
 
+
+// ******************************************************************
+
+uint			CAudioMixerUser::countPlayingSimpleSources() const
+{
+	uint count = 0;
+	for (TSourceContainer::const_iterator it(_Sources.begin()), end(_Sources.end()); it != end; ++it)
+	{
+		if ((*it)->getType() == CSourceCommon::SOURCE_SIMPLE && (*it)->isPlaying())
+			++count;
+	}
+	return count;
+}
+
+uint			CAudioMixerUser::countSimpleSources() const
+{
+	uint count = 0;
+	for (TSourceContainer::const_iterator it(_Sources.begin()), end(_Sources.end()); it != end; ++it)
+	{
+		if ((*it)->getType() == CSourceCommon::SOURCE_SIMPLE)
+			++count;
+	}
+	return count;
+}
+
+
 // ******************************************************************
 
 uint			CAudioMixerUser::getAvailableTracksCount() const
diff --git a/code/nel/src/sound/source_music_channel.cpp b/code/nel/src/sound/source_music_channel.cpp
index 677370dd3..34735f113 100644
--- a/code/nel/src/sound/source_music_channel.cpp
+++ b/code/nel/src/sound/source_music_channel.cpp
@@ -48,6 +48,7 @@ CSourceMusicChannel::CSourceMusicChannel() : m_Source(NULL), m_Gain(1.0f)
 
 CSourceMusicChannel::~CSourceMusicChannel()
 {
+	nlassert(!m_Source);
 	delete m_Source;
 	m_Source = NULL;
 }