diff --git a/include/PeakController.h b/include/PeakController.h
index b56c4c1a5..96240c6df 100644
--- a/include/PeakController.h
+++ b/include/PeakController.h
@@ -54,7 +54,6 @@ public:
 	virtual QString nodeName() const;
 
 	static PeakControllerEffectVector s_effects;
-	static int s_lastEffectId;
 
 
 public slots:
diff --git a/include/song.h b/include/song.h
index 32b36e34b..5900c8c93 100644
--- a/include/song.h
+++ b/include/song.h
@@ -278,6 +278,8 @@ public slots:
 
 	void addBBTrack();
 
+	bool isLoadingProject();
+
 
 private slots:
 	void insertBar();
diff --git a/plugins/peak_controller_effect/peak_controller_effect.cpp b/plugins/peak_controller_effect/peak_controller_effect.cpp
index 4069c941b..0d8238262 100644
--- a/plugins/peak_controller_effect/peak_controller_effect.cpp
+++ b/plugins/peak_controller_effect/peak_controller_effect.cpp
@@ -31,7 +31,6 @@
 
 #include "embed.cpp"
 
-
 extern "C"
 {
 
@@ -61,6 +60,7 @@ PeakControllerEffect::PeakControllerEffect(
 			Model * _parent,
 			const Descriptor::SubPluginFeatures::Key * _key ) :
 	Effect( &peakcontrollereffect_plugin_descriptor, _parent, _key ),
+	m_effectId( rand() ),
 	m_peakControls( this ),
 	m_lastSample( 0 ),
 	m_lastRMS( -1 ),
diff --git a/plugins/peak_controller_effect/peak_controller_effect_controls.cpp b/plugins/peak_controller_effect/peak_controller_effect_controls.cpp
index 34ee79a11..aaeec368a 100644
--- a/plugins/peak_controller_effect/peak_controller_effect_controls.cpp
+++ b/plugins/peak_controller_effect/peak_controller_effect_controls.cpp
@@ -30,6 +30,7 @@
 #include "peak_controller_effect_controls.h"
 #include "peak_controller_effect.h"
 #include "preset_preview_play_handle.h"
+#include "song.h"
 
 
 PeakControllerEffectControls::
@@ -60,14 +61,23 @@ void PeakControllerEffectControls::loadSettings( const QDomElement & _this )
 	m_absModel.loadSettings( _this, "abs" );
 	m_amountMultModel.loadSettings( _this, "amountmult" );
 
-	int effectId = _this.attribute( "effectId" ).toInt();
-	if( effectId > PeakController::s_lastEffectId )
+	/*If the peak controller effect is NOT loaded from project,
+	 * m_effectId stored is useless.
+	 * Reason to assign a random number to it:
+	 * If the user clone the instrument, and m_effectId is cloned, and
+	 * m_effectId is copied, then there would be two instruments
+	 * having the same id.
+	 */
+	if( engine::getSong()->isLoadingProject() == true )
 	{
-		PeakController::s_lastEffectId = effectId;
+		m_effect->m_effectId = _this.attribute( "effectId" ).toInt();
+	}
+	else
+	{
+		m_effect->m_effectId = rand();
 	}
-	m_effect->m_effectId = effectId;
 
-	if( m_effect->m_autoController && presetPreviewPlayHandle::isPreviewing() == false )
+    if( m_effect->m_autoController && ( engine::getSong()->isLoadingProject() == true || presetPreviewPlayHandle::isPreviewing() == false ) )
 	{
 		delete m_effect->m_autoController;
 		m_effect->m_autoController = 0;
diff --git a/src/core/PeakController.cpp b/src/core/PeakController.cpp
index 7d5407df0..91d567a06 100644
--- a/src/core/PeakController.cpp
+++ b/src/core/PeakController.cpp
@@ -37,7 +37,6 @@
 #include "ControllerDialog.h"
 #include "plugins/peak_controller_effect/peak_controller_effect.h"
 
-int PeakController::s_lastEffectId = 0;
 PeakControllerEffectVector PeakController::s_effects;
 
 
diff --git a/src/core/preset_preview_play_handle.cpp b/src/core/preset_preview_play_handle.cpp
index 22ff31a50..ca247c44a 100644
--- a/src/core/preset_preview_play_handle.cpp
+++ b/src/core/preset_preview_play_handle.cpp
@@ -258,12 +258,7 @@ ConstNotePlayHandleList presetPreviewPlayHandle::nphsOfInstrumentTrack(
 
 bool presetPreviewPlayHandle::isPreviewing()
 {
-	bool ret = s_previewTC->m_dataMutex.tryLock();
-	if( ret == true )
-	{
-		s_previewTC->m_dataMutex.unlock();
-	}
-	return ret;
+	return s_previewTC->isPreviewing();
 }
 
 
diff --git a/src/core/song.cpp b/src/core/song.cpp
index f01e7f0cd..4235b1dd8 100644
--- a/src/core/song.cpp
+++ b/src/core/song.cpp
@@ -1494,6 +1494,13 @@ void song::removeController( Controller * _controller )
 
 
 
+
+bool song::isLoadingProject()
+{
+	return m_loadingProject;
+}
+
+
 #include "moc_song.cxx"