diff --git a/include/SampleBuffer.h b/include/SampleBuffer.h
index dd832281b..ef97f84ee 100644
--- a/include/SampleBuffer.h
+++ b/include/SampleBuffer.h
@@ -267,7 +267,7 @@ public slots:
 	void setEndFrame( const f_cnt_t _e );
 	void setAmplification( float _a );
 	void setReversed( bool _on );
-
+	void sampleRateChanged();
 
 private:
 	void update( bool _keep_settings = false );
diff --git a/plugins/LadspaEffect/LadspaEffect.cpp b/plugins/LadspaEffect/LadspaEffect.cpp
index 891a49438..a2336f519 100644
--- a/plugins/LadspaEffect/LadspaEffect.cpp
+++ b/plugins/LadspaEffect/LadspaEffect.cpp
@@ -307,6 +307,8 @@ void LadspaEffect::pluginInstantiation()
 	int inputch = 0;
 	int outputch = 0;
 	LADSPA_Data * inbuf [2];
+	inbuf[0] = NULL;
+	inbuf[1] = NULL;
 	for( ch_cnt_t proc = 0; proc < processorCount(); proc++ )
 	{
 		multi_proc_t ports;
@@ -335,7 +337,7 @@ void LadspaEffect::pluginInstantiation()
 					manager->isPortOutput( m_key, port ) )
 				{
 					p->rate = CHANNEL_OUT;
-					if( ! m_inPlaceBroken )
+					if( ! m_inPlaceBroken && inbuf[ outputch ] )
 					{
 						p->buffer = inbuf[ outputch ];
 						outputch++;
@@ -343,6 +345,7 @@ void LadspaEffect::pluginInstantiation()
 					else
 					{
 						p->buffer = MM_ALLOC( LADSPA_Data, engine::mixer()->framesPerPeriod() );
+						m_inPlaceBroken = true;
 					}
 				}
 				else if( manager->isPortInput( m_key, port ) )
diff --git a/src/core/SampleBuffer.cpp b/src/core/SampleBuffer.cpp
index 5d218ab06..d0e0397fc 100644
--- a/src/core/SampleBuffer.cpp
+++ b/src/core/SampleBuffer.cpp
@@ -84,6 +84,7 @@ SampleBuffer::SampleBuffer( const QString & _audio_file,
 	{
 		loadFromBase64( _audio_file );
 	}
+	connect( engine::mixer(), SIGNAL( sampleRateChanged() ), this, SLOT( sampleRateChanged() ) );
 	update();
 }
 
@@ -111,6 +112,7 @@ SampleBuffer::SampleBuffer( const sampleFrame * _data, const f_cnt_t _frames ) :
 		memcpy( m_origData, _data, _frames * BYTES_PER_FRAME );
 		m_origFrames = _frames;
 	}
+	connect( engine::mixer(), SIGNAL( sampleRateChanged() ), this, SLOT( sampleRateChanged() ) );
 	update();
 }
 
@@ -138,6 +140,7 @@ SampleBuffer::SampleBuffer( const f_cnt_t _frames ) :
 		memset( m_origData, 0, _frames * BYTES_PER_FRAME );
 		m_origFrames = _frames;
 	}
+	connect( engine::mixer(), SIGNAL( sampleRateChanged() ), this, SLOT( sampleRateChanged() ) );
 	update();
 }
 
@@ -152,7 +155,10 @@ SampleBuffer::~SampleBuffer()
 
 
 
-
+void SampleBuffer::sampleRateChanged()
+{
+	update();
+}
 
 
 void SampleBuffer::update( bool _keep_settings )