diff --git a/data/themes/default/mixer_send_off.png b/data/themes/default/mixer_send_off.png
index 1be1ad54f..3033c4962 100644
Binary files a/data/themes/default/mixer_send_off.png and b/data/themes/default/mixer_send_off.png differ
diff --git a/data/themes/default/mixer_send_on.png b/data/themes/default/mixer_send_on.png
index 15c8fac44..776398e9f 100644
Binary files a/data/themes/default/mixer_send_on.png and b/data/themes/default/mixer_send_on.png differ
diff --git a/data/themes/default/receive_bg_arrow.png b/data/themes/default/receive_bg_arrow.png
new file mode 100644
index 000000000..f456176e0
Binary files /dev/null and b/data/themes/default/receive_bg_arrow.png differ
diff --git a/data/themes/default/send_bg_arrow.png b/data/themes/default/send_bg_arrow.png
index daeb9fe65..8c4bfcf93 100644
Binary files a/data/themes/default/send_bg_arrow.png and b/data/themes/default/send_bg_arrow.png differ
diff --git a/include/FxLine.h b/include/FxLine.h
index 2445e2aac..771ab21af 100644
--- a/include/FxLine.h
+++ b/include/FxLine.h
@@ -61,10 +61,14 @@ public:
 	static const int FxLineHeight;
 
 private:
+	static void drawFxLine( QPainter* p, const FxLine *fxLine, const QString& name, bool isActive, bool sendToThis, bool receiveFromThis );
+
 	FxMixerView * m_mv;
 	LcdWidget* m_lcd;
 	int m_channelIndex;
 	QBrush m_backgroundActive;
+	static QPixmap * s_sendBgArrow;
+	static QPixmap * s_receiveBgArrow;
 
 private slots:
 	void renameChannel();
diff --git a/include/FxMixer.h b/include/FxMixer.h
index 8136d9ed4..1b24bb54b 100644
--- a/include/FxMixer.h
+++ b/include/FxMixer.h
@@ -32,7 +32,8 @@
 #include "ThreadableJob.h"
 
 
-
+class FxRoute;
+typedef QVector<FxRoute *> FxRouteVector;
 
 class FxChannel : public ThreadableJob
 {
@@ -58,11 +59,10 @@ class FxChannel : public ThreadableJob
 		bool m_queued; // are we queued up for rendering yet?
 
 		// pointers to other channels that this one sends to
-		QVector<fx_ch_t> m_sends;
-		QVector<FloatModel *> m_sendAmount;
+		FxRouteVector m_sends;
 
 		// pointers to other channels that send to this one
-		QVector<fx_ch_t> m_receives;
+		FxRouteVector m_receives;
 
 		virtual bool requiresProcessing() const { return true; }
 
@@ -71,6 +71,45 @@ class FxChannel : public ThreadableJob
 };
 
 
+class FxRoute : public QObject
+{
+	public:		
+		FxRoute( FxChannel * from, FxChannel * to, float amount );
+		virtual ~FxRoute();
+		
+	fx_ch_t senderIndex() const
+	{
+		return m_from->m_channelIndex;
+	}
+	
+	fx_ch_t receiverIndex() const
+	{
+		return m_to->m_channelIndex;
+	}
+	
+	FloatModel * amount() const
+	{
+		return m_amount;
+	}
+	
+	FxChannel * sender() const
+	{
+		return m_from;
+	}
+	
+	FxChannel * receiver() const
+	{
+		return m_to;
+	}
+	
+	void updateName();
+		
+	private:
+		FxChannel * m_from;
+		FxChannel * m_to;
+		FloatModel * m_amount;
+};
+
 
 class EXPORT FxMixer : public JournallingObject, public Model
 {
@@ -100,13 +139,16 @@ public:
 	// it is safe to call even if the send already exists
 	void createChannelSend(fx_ch_t fromChannel, fx_ch_t toChannel,
 						   float amount = 1.0f);
+	void createRoute( FxChannel * from, FxChannel * to, float amount );
 
 	// delete the connection made by createChannelSend
 	void deleteChannelSend(fx_ch_t fromChannel, fx_ch_t toChannel);
+	void deleteChannelSend( FxRoute * route );
 
 	// determine if adding a send from sendFrom to
 	// sendTo would result in an infinite mixer loop.
 	bool isInfiniteLoop(fx_ch_t fromChannel, fx_ch_t toChannel);
+	bool checkInfiniteLoop( FxChannel * from, FxChannel * to );
 
 	// return the FloatModel of fromChannel sending its output to the input of
 	// toChannel. NULL if there is no send.
@@ -129,11 +171,16 @@ public:
 	// reset a channel's name, fx, sends, etc
 	void clearChannel(fx_ch_t channelIndex);
 
+	// rename channels when moving etc. if they still have their original name
+	void validateChannelName( int index, int oldIndex );
+
 	inline fx_ch_t numChannels() const
 	{
 		return m_fxChannels.size();
 	}
 
+	FxRouteVector m_fxRoutes;
+
 private:
 	// the fx channels in the mixer. index 0 is always master.
 	QVector<FxChannel *> m_fxChannels;
@@ -142,7 +189,7 @@ private:
 	void allocateChannelsTo(int num);
 	QMutex m_sendsMutex;
 
-	void addChannelLeaf( int _ch, sampleFrame * _buf );
+	void addChannelLeaf( FxChannel * ch, sampleFrame * buf );
 
 	friend class MixerWorkerThread;
 	friend class FxMixerView;
diff --git a/include/basic_filters.h b/include/basic_filters.h
index e32ed886b..5f1055685 100644
--- a/include/basic_filters.h
+++ b/include/basic_filters.h
@@ -1,11 +1,11 @@
 /*
  * basic_filters.h - simple but powerful filter-class with most used filters
  *
- * original file by ??? 
+ * original file by ???
  * modified and enhanced by Tobias Doerffel
  *
  * Copyright (c) 2004-2009 Tobias Doerffel <tobydox/at/users.sourceforge.net>
- * 
+ *
  * This file is part of Linux MultiMedia Studio - http://lmms.sourceforge.net
  *
  * This program is free software; you can redistribute it and/or
@@ -26,8 +26,8 @@
  */
 
 
-#ifndef _BASIC_FILTERS_H
-#define _BASIC_FILTERS_H
+#ifndef BASIC_FILTERS_H
+#define BASIC_FILTERS_H
 
 #ifndef __USE_XOPEN
 #define __USE_XOPEN
@@ -39,6 +39,7 @@
 #include "Mixer.h"
 #include "templates.h"
 #include "lmms_constants.h"
+#include "interpolation.h"
 
 //#include <iostream>
 //#include <cstdlib>
@@ -127,16 +128,16 @@ public:
 			// reset in/out history for simple filters
 			m_ou1[_chnl] = m_ou2[_chnl] = m_in1[_chnl] =
 					m_in2[_chnl] = 0.0f;
-					
+
 			// reset in/out history for moog-filter
 			m_y1[_chnl] = m_y2[_chnl] = m_y3[_chnl] = m_y4[_chnl] =
 					m_oldx[_chnl] = m_oldy1[_chnl] =
 					m_oldy2[_chnl] = m_oldy3[_chnl] = 0.0f;
-					
+
 			// reset in/out history for RC-filters
 			m_rclp0[_chnl] = m_rcbp0[_chnl] = m_rchp0[_chnl] = m_rclast0[_chnl] = 0.0f;
 			m_rclp1[_chnl] = m_rcbp1[_chnl] = m_rchp1[_chnl] = m_rclast1[_chnl] = 0.0f;
-			
+
 			for(int i=0; i<6; i++)
 			   m_vfbp[i][_chnl] = m_vfhp[i][_chnl] = m_vflast[i][_chnl] = 0.0f;
 		}
@@ -186,130 +187,135 @@ public:
 			// (C) 1998 ... 2009 S.Fendt. Released under the GPL v2.0  or any later version.
 
 			case Lowpass_RC12:
-			case Bandpass_RC12:
-			case Highpass_RC12:
 			{
-				sample_t lp, hp, bp;
-
-				sample_t in;
-
-				// 4-times oversampled... (even the moog-filter would benefit from this)
+				sample_t lp, bp, hp, in;
 				for( int n = 4; n != 0; --n )
 				{
 					in = _in0 + m_rcbp0[_chnl] * m_rcq;
-					in = (in > +1.f) ? +1.f : in;
-					in = (in < -1.f) ? -1.f : in;
+					in = qBound( -1.0f, in, 1.0f );
 
 					lp = in * m_rcb + m_rclp0[_chnl] * m_rca;
-					lp = (lp > +1.f) ? +1.f : lp;
-					lp = (lp < -1.f) ? -1.f : lp;
+					lp = qBound( -1.0f, lp, 1.0f );
 
 					hp = m_rcc * ( m_rchp0[_chnl] + in - m_rclast0[_chnl] );
-					hp = (hp > +1.f) ? +1.f : hp;
-					hp = (hp < -1.f) ? -1.f : hp;
+					hp = qBound( -1.0f, hp, 1.0f );
 
 					bp = hp * m_rcb + m_rcbp0[_chnl] * m_rca;
-					bp = (bp > +1.f) ? +1.f : bp;
-					bp = (bp < -1.f) ? -1.f : bp;
+					bp = qBound( -1.0f, bp, 1.0f );
 
 					m_rclast0[_chnl] = in;
 					m_rclp0[_chnl] = lp;
 					m_rchp0[_chnl] = hp;
 					m_rcbp0[_chnl] = bp;
 				}
+				return lp;
+				break;
+			}
+			case Highpass_RC12:
+			case Bandpass_RC12:
+			{
+				sample_t hp, bp, in;
+				for( int n = 4; n != 0; --n )
+				{
+					in = _in0 + m_rcbp0[_chnl] * m_rcq;
+					in = qBound( -1.0f, in, 1.0f );
 
-				if( m_type == Lowpass_RC12 )
-					out = lp;
-				else if( m_type == Bandpass_RC12 )
-					out = bp;
-				else
-					out = hp;
-				
-				return( out );
+					hp = m_rcc * ( m_rchp0[_chnl] + in - m_rclast0[_chnl] );
+					hp = qBound( -1.0f, hp, 1.0f );
+
+					bp = hp * m_rcb + m_rcbp0[_chnl] * m_rca;
+					bp = qBound( -1.0f, bp, 1.0f );
+
+					m_rclast0[_chnl] = in;
+					m_rchp0[_chnl] = hp;
+					m_rcbp0[_chnl] = bp;
+				}
+				return m_type == Highpass_RC12 ? hp : bp;
 				break;
 			}
 
 			case Lowpass_RC24:
-			case Bandpass_RC24:
-			case Highpass_RC24:
 			{
-				sample_t lp, hp, bp;
-
-				sample_t in;
-
+				sample_t lp, bp, hp, in;
 				for( int n = 4; n != 0; --n )
 				{
 					// first stage is as for the 12dB case...
 					in = _in0 + m_rcbp0[_chnl] * m_rcq;
-					in = (in > +1.f) ? +1.f : in;
-					in = (in < -1.f) ? -1.f : in;
+					in = qBound( -1.0f, in, 1.0f );
 
 					lp = in * m_rcb + m_rclp0[_chnl] * m_rca;
-					lp = (lp > +1.f) ? +1.f : lp;
-					lp = (lp < -1.f) ? -1.f : lp;
+					lp = qBound( -1.0f, lp, 1.0f );
 
 					hp = m_rcc * ( m_rchp0[_chnl] + in - m_rclast0[_chnl] );
-					hp = (hp > +1.f) ? +1.f : hp;
-					hp = (hp < -1.f) ? -1.f : hp;
+					hp = qBound( -1.0f, hp, 1.0f );
 
 					bp = hp * m_rcb + m_rcbp0[_chnl] * m_rca;
-					bp = (bp > +1.f) ? +1.f : bp;
-					bp = (bp < -1.f) ? -1.f : bp;
+					bp = qBound( -1.0f, bp, 1.0f );
 
 					m_rclast0[_chnl] = in;
 					m_rclp0[_chnl] = lp;
+					m_rcbp0[_chnl] = bp;
+					m_rchp0[_chnl] = hp;
+
+					// second stage gets the output of the first stage as input...
+					in = lp + m_rcbp1[_chnl] * m_rcq;
+					in = qBound( -1.0f, in, 1.0f );
+
+					lp = in * m_rcb + m_rclp1[_chnl] * m_rca;
+					lp = qBound( -1.0f, lp, 1.0f );
+
+					hp = m_rcc * ( m_rchp1[_chnl] + in - m_rclast1[_chnl] );
+					hp = qBound( -1.0f, hp, 1.0f );
+
+					bp = hp * m_rcb + m_rcbp1[_chnl] * m_rca;
+					bp = qBound( -1.0f, bp, 1.0f );
+
+					m_rclast1[_chnl] = in;
+					m_rclp1[_chnl] = lp;
+					m_rcbp1[_chnl] = bp;
+					m_rchp1[_chnl] = hp;
+				}
+				return lp;
+				break;
+			}
+			case Highpass_RC24:
+			case Bandpass_RC24:
+			{
+				sample_t hp, bp, in;
+				for( int n = 4; n != 0; --n )
+				{
+					// first stage is as for the 12dB case...
+					in = _in0 + m_rcbp0[_chnl] * m_rcq;
+					in = qBound( -1.0f, in, 1.0f );
+
+					hp = m_rcc * ( m_rchp0[_chnl] + in - m_rclast0[_chnl] );
+					hp = qBound( -1.0f, hp, 1.0f );
+
+					bp = hp * m_rcb + m_rcbp0[_chnl] * m_rca;
+					bp = qBound( -1.0f, bp, 1.0f );
+
+					m_rclast0[_chnl] = in;
 					m_rchp0[_chnl] = hp;
 					m_rcbp0[_chnl] = bp;
 
 					// second stage gets the output of the first stage as input...
-					if( m_type == Lowpass_RC24 )
-					{
-						in = lp + m_rcbp1[_chnl] * m_rcq;
-					}
-					else if( m_type == Bandpass_RC24 )
-					{
-						in = bp + m_rcbp1[_chnl] * m_rcq;
-					}
-					else
-					{
-   						in = hp + m_rcbp1[_chnl] * m_rcq;
-					}
-					in = (in > +1.f) ? +1.f : in;
-					in = (in < -1.f) ? -1.f : in;
+					in = m_type == Highpass_RC24
+						? hp + m_rcbp1[_chnl] * m_rcq
+						: bp + m_rcbp1[_chnl] * m_rcq;
 
-					lp = in * m_rcb + m_rclp1[_chnl] * m_rca;
-					lp = (lp > +1.f) ? +1.f : lp;
-					lp = (lp < -1.f) ? -1.f : lp;
+					in = qBound( -1.0f, in, 1.0f );
 
 					hp = m_rcc * ( m_rchp1[_chnl] + in - m_rclast1[_chnl] );
-					hp = (hp > +1.f) ? +1.f : hp;
-					hp = (hp < -1.f) ? -1.f : hp;
+					hp = qBound( -1.0f, hp, 1.0f );
 
 					bp = hp * m_rcb + m_rcbp1[_chnl] * m_rca;
-					bp = (bp > +1.f) ? +1.f : bp;
-					bp = (bp < -1.f) ? -1.f : bp;
+					bp = qBound( -1.0f, bp, 1.0f );
 
 					m_rclast1[_chnl] = in;
-					m_rclp1[_chnl] = lp;
 					m_rchp1[_chnl] = hp;
 					m_rcbp1[_chnl] = bp;
 				}
-
-				// output is second stage-lowpass...
-				if( m_type == Lowpass_RC24 )
-				{
-					out = lp;
-				}
-				else if( m_type == Bandpass_RC24 )
-				{
-					out = bp;
-				}
-				else
-				{
-					out = hp;
-				}
-			
-				return out;
+				return m_type == Highpass_RC24 ? hp : bp;
 				break;
 			}
 
@@ -317,116 +323,97 @@ public:
 			{
 				sample_t hp, bp, in;
 
-		out = 0;
-		for(int o=0; o<4; o++)
-		{
-			// first formant
-			in = _in0 + m_vfbp[0][_chnl] * m_vfq;
-			in = (in > +1.f) ? +1.f : in;
-			in = (in < -1.f) ? -1.f : in;
+				out = 0;
+				for(int o=0; o<4; o++)
+				{
+					// first formant
+					in = _in0 + m_vfbp[0][_chnl] * m_vfq;
+					in = qBound( -1.0f, in, 1.0f );
 
-			hp = m_vfc[0] * ( m_vfhp[0][_chnl] + in - m_vflast[0][_chnl] );
-			hp = (hp > +1.f) ? +1.f : hp;
-			hp = (hp < -1.f) ? -1.f : hp;
+					hp = m_vfc[0] * ( m_vfhp[0][_chnl] + in - m_vflast[0][_chnl] );
+					hp = qBound( -1.0f, hp, 1.0f );
 
-			bp = hp * m_vfb[0] + m_vfbp[0][_chnl] * m_vfa[0];
-			bp = (bp > +1.f) ? +1.f : bp;
-			bp = (bp < -1.f) ? -1.f : bp;
+					bp = hp * m_vfb[0] + m_vfbp[0][_chnl] * m_vfa[0];
+					bp = qBound( -1.0f, bp, 1.0f );
 
-			m_vflast[0][_chnl] = in;
-			m_vfhp[0][_chnl] = hp;
-			m_vfbp[0][_chnl] = bp;
+					m_vflast[0][_chnl] = in;
+					m_vfhp[0][_chnl] = hp;
+					m_vfbp[0][_chnl] = bp;
 
-			in = bp + m_vfbp[2][_chnl] * m_vfq;
-			in = (in > +1.f) ? +1.f : in;
-			in = (in < -1.f) ? -1.f : in;
+					in = bp + m_vfbp[2][_chnl] * m_vfq;
+					in = qBound( -1.0f, in, 1.0f );
 
-			hp = m_vfc[0] * ( m_vfhp[2][_chnl] + in - m_vflast[2][_chnl] );
-			hp = (hp > +1.f) ? +1.f : hp;
-			hp = (hp < -1.f) ? -1.f : hp;
+					hp = m_vfc[0] * ( m_vfhp[2][_chnl] + in - m_vflast[2][_chnl] );
+					hp = qBound( -1.0f, hp, 1.0f );
 
-			bp = hp * m_vfb[0] + m_vfbp[2][_chnl] * m_vfa[0];
-			bp = (bp > +1.f) ? +1.f : bp;
-			bp = (bp < -1.f) ? -1.f : bp;
+					bp = hp * m_vfb[0] + m_vfbp[2][_chnl] * m_vfa[0];
+					bp = qBound( -1.0f, bp, 1.0f );
 
-			m_vflast[2][_chnl] = in;
-			m_vfhp[2][_chnl] = hp;
-			m_vfbp[2][_chnl] = bp;  
+					m_vflast[2][_chnl] = in;
+					m_vfhp[2][_chnl] = hp;
+					m_vfbp[2][_chnl] = bp;  
 			      
-			in = bp + m_vfbp[4][_chnl] * m_vfq;
-			in = (in > +1.f) ? +1.f : in;
-			in = (in < -1.f) ? -1.f : in;
+					in = bp + m_vfbp[4][_chnl] * m_vfq;
+					in = qBound( -1.0f, in, 1.0f );
 
-			hp = m_vfc[0] * ( m_vfhp[4][_chnl] + in - m_vflast[4][_chnl] );
-			hp = (hp > +1.f) ? +1.f : hp;
-			hp = (hp < -1.f) ? -1.f : hp;
+					hp = m_vfc[0] * ( m_vfhp[4][_chnl] + in - m_vflast[4][_chnl] );
+					hp = qBound( -1.0f, hp, 1.0f );
 
-			bp = hp * m_vfb[0] + m_vfbp[4][_chnl] * m_vfa[0];
-			bp = (bp > +1.f) ? +1.f : bp;
-			bp = (bp < -1.f) ? -1.f : bp;
+					bp = hp * m_vfb[0] + m_vfbp[4][_chnl] * m_vfa[0];
+					bp = qBound( -1.0f, bp, 1.0f );
 
-			m_vflast[4][_chnl] = in;
-			m_vfhp[4][_chnl] = hp;
-			m_vfbp[4][_chnl] = bp;  
+					m_vflast[4][_chnl] = in;
+					m_vfhp[4][_chnl] = hp;
+					m_vfbp[4][_chnl] = bp;  
 
-			out += bp;
+					out += bp;
 
-			// second formant
-			in = _in0 + m_vfbp[0][_chnl] * m_vfq;
-			in = (in > +1.f) ? +1.f : in;
-			in = (in < -1.f) ? -1.f : in;
+					// second formant
+					in = _in0 + m_vfbp[0][_chnl] * m_vfq;
+					in = qBound( -1.0f, in, 1.0f );
 
-			hp = m_vfc[1] * ( m_vfhp[1][_chnl] + in - m_vflast[1][_chnl] );
-			hp = (hp > +1.f) ? +1.f : hp;
-			hp = (hp < -1.f) ? -1.f : hp;
+					hp = m_vfc[1] * ( m_vfhp[1][_chnl] + in - m_vflast[1][_chnl] );
+					hp = qBound( -1.0f, hp, 1.0f );
 
-			bp = hp * m_vfb[1] + m_vfbp[1][_chnl] * m_vfa[1];
-			bp = (bp > +1.f) ? +1.f : bp;
-			bp = (bp < -1.f) ? -1.f : bp;
+					bp = hp * m_vfb[1] + m_vfbp[1][_chnl] * m_vfa[1];
+					bp = qBound( -1.0f, bp, 1.0f );
 
-			m_vflast[1][_chnl] = in;
-			m_vfhp[1][_chnl] = hp;
-			m_vfbp[1][_chnl] = bp;
+					m_vflast[1][_chnl] = in;
+					m_vfhp[1][_chnl] = hp;
+					m_vfbp[1][_chnl] = bp;
 
-			in = bp + m_vfbp[3][_chnl] * m_vfq;
-			in = (in > +1.f) ? +1.f : in;
-			in = (in < -1.f) ? -1.f : in;
+					in = bp + m_vfbp[3][_chnl] * m_vfq;
+					in = qBound( -1.0f, in, 1.0f );
 
-			hp = m_vfc[1] * ( m_vfhp[3][_chnl] + in - m_vflast[3][_chnl] );
-			hp = (hp > +1.f) ? +1.f : hp;
-			hp = (hp < -1.f) ? -1.f : hp;
+					hp = m_vfc[1] * ( m_vfhp[3][_chnl] + in - m_vflast[3][_chnl] );
+					hp = qBound( -1.0f, hp, 1.0f );
 
-			bp = hp * m_vfb[1] + m_vfbp[3][_chnl] * m_vfa[1];
-			bp = (bp > +1.f) ? +1.f : bp;
-			bp = (bp < -1.f) ? -1.f : bp;
+					bp = hp * m_vfb[1] + m_vfbp[3][_chnl] * m_vfa[1];
+					bp = qBound( -1.0f, bp, 1.0f );
 
-			m_vflast[3][_chnl] = in;
-			m_vfhp[3][_chnl] = hp;
-			m_vfbp[3][_chnl] = bp;  
+					m_vflast[3][_chnl] = in;
+					m_vfhp[3][_chnl] = hp;
+					m_vfbp[3][_chnl] = bp;  
 
-			in = bp + m_vfbp[5][_chnl] * m_vfq;
-			in = (in > +1.f) ? +1.f : in;
-			in = (in < -1.f) ? -1.f : in;
+					in = bp + m_vfbp[5][_chnl] * m_vfq;
+					in = qBound( -1.0f, in, 1.0f );
 
-			hp = m_vfc[1] * ( m_vfhp[5][_chnl] + in - m_vflast[5][_chnl] );
-			hp = (hp > +1.f) ? +1.f : hp;
-			hp = (hp < -1.f) ? -1.f : hp;
+					hp = m_vfc[1] * ( m_vfhp[5][_chnl] + in - m_vflast[5][_chnl] );
+					hp = qBound( -1.0f, hp, 1.0f );
 
-			bp = hp * m_vfb[1] + m_vfbp[5][_chnl] * m_vfa[1];
-			bp = (bp > +1.f) ? +1.f : bp;
-			bp = (bp < -1.f) ? -1.f : bp;
+					bp = hp * m_vfb[1] + m_vfbp[5][_chnl] * m_vfa[1];
+					bp = qBound( -1.0f, bp, 1.0f );
 
-			m_vflast[5][_chnl] = in;
-			m_vfhp[5][_chnl] = hp;
-			m_vfbp[5][_chnl] = bp;  
+					m_vflast[5][_chnl] = in;
+					m_vfhp[5][_chnl] = hp;
+					m_vfbp[5][_chnl] = bp;  
 
-			out += bp;
-            }
-            
-				return( out/2.0f );
+					out += bp;
+				}
+            	return( out/2.0f );
 				break;
 			}
-			
+
 			default:
 				// filter
 				out = m_b0a0*_in0 +
@@ -458,9 +445,6 @@ public:
 				/*, const bool _q_is_bandwidth = false*/ )
 	{
 		// temp coef vars
-		_freq = qBound(minFreq(), _freq, 20000.0f); // limit freq and q for not getting
-                                                            // bad noise out of the filter...
-
 		_q = qMax( _q, minQ() );
 
 		if( m_type == Lowpass_RC12  ||
@@ -470,41 +454,39 @@ public:
 			m_type == Bandpass_RC24 ||
 			m_type == Highpass_RC24 )
 		{
-			if( _freq < 50.f )
-			{
-				_freq = 50.f;
-			}
-		
+			_freq = qBound( 50.0f, _freq, 20000.0f );
+
 			m_rca = 1.0f - (1.0f/(m_sampleRate*4)) / ( (1.0f/(_freq*2.0f*M_PI)) + (1.0f/(m_sampleRate*4)) );
 			m_rcb = 1.0f - m_rca;
 			m_rcc = (1.0f/(_freq*2.0f*M_PI)) / ( (1.0f/(_freq*2.0f*M_PI)) + (1.0f/(m_sampleRate*4)) );
-			
+
 			// Stretch Q/resonance, as self-oscillation reliably starts at a q of ~2.5 - ~2.6
-			m_rcq = _q/4.f;
+			m_rcq = _q * 0.25f;
+			return;
 		}
 
 		if( m_type == Formantfilter )
 		{
+			_freq = qBound( minFreq(), _freq, 20000.0f ); // limit freq and q for not getting bad noise out of the filter...
+
 			// formats for a, e, i, o, u, a
-			const float _f[5][2] = { { 1000, 1400 }, { 500, 2300 },
+			static const float _f[5][2] = { { 1000, 1400 }, { 500, 2300 },
 							{ 320, 3200 },
 							{ 500, 1000 },
 							{ 320, 800 } };
+			static const float freqRatio = 4.0f / 14000.0f;
 
 			// Stretch Q/resonance
-			m_vfq = _q/4.f;
+			m_vfq = _q * 0.25f;
 
 			// frequency in lmms ranges from 1Hz to 14000Hz
-			const int vowel = (int)( floor( _freq/14000.f * 4.f ) );
-			const float fract = ( _freq/14000.f * 4.f ) -
-								(float)vowel;
+			const float vowelf = _freq * freqRatio;
+			const int vowel = static_cast<int>( vowelf );
+			const float fract = vowelf - vowel;
 
-			// interpolate between formant frequencies         
-			const float f0 = _f[vowel+0][0] * ( 1.0f - fract ) + 
-						_f[vowel+1][0] * ( fract );
-
-			const float f1 = _f[vowel+0][1] * ( 1.0f - fract ) + 
-						_f[vowel+1][1] * ( fract );
+			// interpolate between formant frequencies
+			const float f0 = linearInterpolate( _f[vowel+0][0], _f[vowel+1][0], fract );
+			const float f1 = linearInterpolate( _f[vowel+0][1], _f[vowel+1][1], fract );
 
 			m_vfa[0] = 1.0f - (1.0f/(m_sampleRate*4)) /
 						( (1.0f/(f0*2.0f*M_PI)) +
@@ -521,10 +503,13 @@ public:
 			m_vfc[1] = (1.0f/(f1*2.0f*M_PI)) /
 					( (1.0f/(f1*2.0f*M_PI)) +
 						(1.0f/(m_sampleRate*4)) );
+			return;
 		}
-		
+
 		if( m_type == Moog )
 		{
+			_freq = qBound( minFreq(), _freq, 20000.0f ); 
+
 			// [ 0 - 0.5 ]
 			const float f = _freq / m_sampleRate;
 			// (Empirical tunning)
@@ -542,6 +527,7 @@ public:
 		}
 
 		// other filters
+		_freq = qBound( minFreq(), _freq, 20000.0f ); 
 		const float omega = F_2PI * _freq / m_sampleRate;
 		const float tsin = sinf( omega );
 		const float tcos = cosf( omega );
@@ -617,7 +603,7 @@ private:
 
 	// coeffs for formant-filters
 	float m_vfa[4], m_vfb[4], m_vfc[4], m_vfq;
-	
+
 	typedef sample_t frame[CHANNELS];
 
 	// in/out history
@@ -625,7 +611,7 @@ private:
 
 	// in/out history for moog-filter
 	frame m_y1, m_y2, m_y3, m_y4, m_oldx, m_oldy1, m_oldy2, m_oldy3;
-	
+
 	// in/out history for RC-type-filters
 	frame m_rcbp0, m_rclp0, m_rchp0, m_rclast0;
 	frame m_rcbp1, m_rclp1, m_rchp1, m_rclast1;
diff --git a/plugins/monstro/Monstro.cpp b/plugins/monstro/Monstro.cpp
index aa61187bd..e34acc2fe 100644
--- a/plugins/monstro/Monstro.cpp
+++ b/plugins/monstro/Monstro.cpp
@@ -142,7 +142,7 @@ void MonstroSynth::renderOutput( fpp_t _frames, sampleFrame * _buf  )
 		if( mod##_e1 != 0.0f ) car += m_env1_buf[f] * mod##_e1; \
 		if( mod##_e2 != 0.0f ) car += m_env2_buf[f] * mod##_e2; \
 		if( mod##_l1 != 0.0f ) car += m_lfo1_buf[f] * mod##_l1; \
-		if( mod##_l2 != 0.0f ) car += m_lfo2_buf[f] * mod##_l2; 
+		if( mod##_l2 != 0.0f ) car += m_lfo2_buf[f] * mod##_l2;
 
 #define modulatephs( car, mod ) \
 		if( mod##_e1 != 0.0f ) car += m_env1_buf[f] * mod##_e1; \
@@ -1673,12 +1673,29 @@ MonstroView::MonstroView( Instrument * _instrument,
 	m_opViewButton -> setActiveGraphic( PLUGIN_NAME::getIconPixmap( "opview_active" ) );
 	m_opViewButton -> setInactiveGraphic( PLUGIN_NAME::getIconPixmap( "opview_inactive" ) );
 	toolTip::add( m_opViewButton, tr( "Operators view" ) );
+	m_opViewButton -> setWhatsThis( tr( "The Operators view contains all the operators. These include both audible "
+										"operators (oscillators) and inaudible operators, or modulators: "
+										"Low-frequency oscillators and Envelopes. "
+										"Knobs and other widgets in the Operators view have their own what's this -texts, "
+										"so you can get more specific help for them that way. " ) );
 
 	pixmapButton * m_matViewButton = new pixmapButton( this, NULL );
 	m_matViewButton -> move( 125,0 );
 	m_matViewButton -> setActiveGraphic( PLUGIN_NAME::getIconPixmap( "matview_active" ) );
 	m_matViewButton -> setInactiveGraphic( PLUGIN_NAME::getIconPixmap( "matview_inactive" ) );
 	toolTip::add( m_matViewButton, tr( "Matrix view" ) );
+	m_matViewButton -> setWhatsThis( tr( "The Matrix view contains the modulation matrix. Here you can define "
+										"the modulation relationships between the various operators: Each "
+										"audible operator (oscillators 1-3) has 3-4 properties that can be "
+										"modulated by any of the modulators. Using more modulations consumes "
+										"more CPU power. "
+										"The view is divided to modulation targets, grouped by the target oscillator. "
+										"Available targets are volume, pitch, phase, pulse width and sub-osc ratio. "
+										"Note: some targets are specific to one oscillator only. "
+										"Each modulation target has 4 knobs, one for each modulator. By default "
+										"the knobs are at 0, which means no modulation. Turning a knob to 1 causes "
+										"that modulator to affect the modulation target as much as possible. Turning "
+										"it to -1 does the same, but the modulation is inversed. " ) );
 
 	m_selectedViewGroup = new automatableButtonGroup( this );
 	m_selectedViewGroup -> addButton( m_opViewButton );
@@ -1850,7 +1867,7 @@ QWidget * MonstroView::setupOperatorsView( QWidget * _parent )
 
 	makeknob( m_osc1VolKnob, KNOBCOL1, O1ROW, "Volume", "%", "osc1Knob" )
 	makeknob( m_osc1PanKnob, KNOBCOL2, O1ROW, "Panning", "", "osc1Knob" )
-	makeknob( m_osc1CrsKnob, KNOBCOL3, O1ROW, "Coarse detune", " seminotes", "osc1Knob" )
+	makeknob( m_osc1CrsKnob, KNOBCOL3, O1ROW, "Coarse detune", " semitones", "osc1Knob" )
 	makeknob( m_osc1FtlKnob, KNOBCOL4, O1ROW, "Finetune left", " cents", "osc1Knob" )
 	makeknob( m_osc1FtrKnob, KNOBCOL5, O1ROW, "Finetune right", " cents", "osc1Knob" )
 	makeknob( m_osc1SpoKnob, KNOBCOL6, O1ROW, "Stereo phase offset", " deg", "osc1Knob" )
@@ -1863,7 +1880,7 @@ QWidget * MonstroView::setupOperatorsView( QWidget * _parent )
 
 	makeknob( m_osc2VolKnob, KNOBCOL1, O2ROW, "Volume", "%", "osc2Knob" )
 	makeknob( m_osc2PanKnob, KNOBCOL2, O2ROW, "Panning", "", "osc2Knob" )
-	makeknob( m_osc2CrsKnob, KNOBCOL3, O2ROW, "Coarse detune", " seminotes", "osc2Knob" )
+	makeknob( m_osc2CrsKnob, KNOBCOL3, O2ROW, "Coarse detune", " semitones", "osc2Knob" )
 	makeknob( m_osc2FtlKnob, KNOBCOL4, O2ROW, "Finetune left", " cents", "osc2Knob" )
 	makeknob( m_osc2FtrKnob, KNOBCOL5, O2ROW, "Finetune right", " cents", "osc2Knob" )
 	makeknob( m_osc2SpoKnob, KNOBCOL6, O2ROW, "Stereo phase offset", " deg", "osc2Knob" )
@@ -1879,7 +1896,7 @@ QWidget * MonstroView::setupOperatorsView( QWidget * _parent )
 
 	makeknob( m_osc3VolKnob, KNOBCOL1, O3ROW, "Volume", "%", "osc3Knob" )
 	makeknob( m_osc3PanKnob, KNOBCOL2, O3ROW, "Panning", "", "osc3Knob" )
-	makeknob( m_osc3CrsKnob, KNOBCOL3, O3ROW, "Coarse detune", " seminotes", "osc3Knob" )
+	makeknob( m_osc3CrsKnob, KNOBCOL3, O3ROW, "Coarse detune", " semitones", "osc3Knob" )
 	makeknob( m_osc3SpoKnob, KNOBCOL4, O3ROW, "Stereo phase offset", " deg", "osc3Knob" )
 	makeknob( m_osc3SubKnob, KNOBCOL5, O3ROW, "Sub-osc mix", "", "osc3Knob" )
 
@@ -1957,6 +1974,130 @@ QWidget * MonstroView::setupOperatorsView( QWidget * _parent )
 	m_o23ModGroup-> addButton( m_fmButton );
 	m_o23ModGroup-> addButton( m_pmButton );
 
+
+
+////////////////////////////////////
+//                                //
+// whatsthis-information strings  //
+//                                //
+////////////////////////////////////
+
+	m_osc1CrsKnob -> setWhatsThis( tr( "The CRS knob changes the tuning of oscillator 1 in semitone steps. " ) );
+	m_osc2CrsKnob -> setWhatsThis( tr( "The CRS knob changes the tuning of oscillator 2 in semitone steps. " ) );
+	m_osc3CrsKnob -> setWhatsThis( tr( "The CRS knob changes the tuning of oscillator 3 in semitone steps. " ) );
+	m_osc1FtlKnob -> setWhatsThis( tr( "FTL and FTR change the finetuning of the oscillator for left and right "
+										"channels respectively. These can add stereo-detuning to the oscillator "
+										"which widens the stereo image and causes an illusion of space. " ) );
+	m_osc1FtrKnob -> setWhatsThis( tr( "FTL and FTR change the finetuning of the oscillator for left and right "
+										"channels respectively. These can add stereo-detuning to the oscillator "
+										"which widens the stereo image and causes an illusion of space. " ) );
+	m_osc2FtlKnob -> setWhatsThis( tr( "FTL and FTR change the finetuning of the oscillator for left and right "
+										"channels respectively. These can add stereo-detuning to the oscillator "
+										"which widens the stereo image and causes an illusion of space. " ) );
+	m_osc2FtrKnob -> setWhatsThis( tr( "FTL and FTR change the finetuning of the oscillator for left and right "
+										"channels respectively. These can add stereo-detuning to the oscillator "
+										"which widens the stereo image and causes an illusion of space. " ) );
+	m_osc1SpoKnob -> setWhatsThis( tr( "The SPO knob modifies the difference in phase between left and right "
+										"channels. Higher difference creates a wider stereo image. " ) );
+	m_osc2SpoKnob -> setWhatsThis( tr( "The SPO knob modifies the difference in phase between left and right "
+										"channels. Higher difference creates a wider stereo image. " ) );
+	m_osc3SpoKnob -> setWhatsThis( tr( "The SPO knob modifies the difference in phase between left and right "
+										"channels. Higher difference creates a wider stereo image. " ) );
+	m_osc1PwKnob -> setWhatsThis( tr( "The PW knob controls the pulse width, also known as duty cycle, "
+										"of oscillator 1. Oscillator 1 is a digital pulse wave oscillator, "
+										"it doesn't produce bandlimited output, which means that you can "
+										"use it as an audible oscillator but it will cause aliasing. You can "
+										"also use it as an inaudible source of a sync signal, which can be "
+										"used to synchronize oscillators 2 and 3. " ) );
+	m_osc1SSRButton -> setWhatsThis( tr( "Send Sync on Rise: When enabled, the Sync signal is sent every time "
+										"the state of oscillator 1 changes from low to high, ie. when the amplitude "
+										"changes from -1 to 1. "
+										"Oscillator 1's pitch, phase and pulse width may affect the timing of syncs, "
+										"but its volume has no effect on them. Sync signals are sent independently "
+										"for both left and right channels. " ) );
+	m_osc1SSFButton -> setWhatsThis( tr( "Send Sync on Fall: When enabled, the Sync signal is sent every time "
+										"the state of oscillator 1 changes from high to low, ie. when the amplitude "
+										"changes from 1 to -1. "
+										"Oscillator 1's pitch, phase and pulse width may affect the timing of syncs, "
+										"but its volume has no effect on them. Sync signals are sent independently "
+										"for both left and right channels. " ) );
+	m_osc2SyncHButton -> setWhatsThis( tr( "Hard sync: Every time the oscillator receives a sync signal from oscillator 1, "
+											"its phase is reset to 0 + whatever its phase offset is. " ) );
+	m_osc3SyncHButton -> setWhatsThis( tr( "Hard sync: Every time the oscillator receives a sync signal from oscillator 1, "
+											"its phase is reset to 0 + whatever its phase offset is. " ) );
+	m_osc2SyncRButton -> setWhatsThis( tr( "Reverse sync: Every time the oscillator receives a sync signal from oscillator 1, "
+											"the amplitude of the oscillator gets inverted. " ) );
+	m_osc3SyncRButton -> setWhatsThis( tr( "Reverse sync: Every time the oscillator receives a sync signal from oscillator 1, "
+											"the amplitude of the oscillator gets inverted. " ) );
+	m_osc2WaveBox -> setWhatsThis( tr( "Choose waveform for oscillator 2. " ) );
+	m_osc3Wave1Box -> setWhatsThis( tr( "Choose waveform for oscillator 3's first sub-osc. "
+										"Oscillator 3 can smoothly interpolate between two different waveforms. " ) );
+	m_osc3Wave2Box -> setWhatsThis( tr( "Choose waveform for oscillator 3's second sub-osc. "
+										"Oscillator 3 can smoothly interpolate between two different waveforms. " ) );
+	m_osc3SubKnob -> setWhatsThis( tr( "The SUB knob changes the mixing ratio of the two sub-oscs of oscillator 3. "
+										"Each sub-osc can be set to produce a different waveform, and oscillator 3 "
+										"can smoothly interpolate between them. All incoming modulations to oscillator 3 are applied "
+										"to both sub-oscs/waveforms in the exact same way. " ) );
+	m_mixButton -> setWhatsThis( tr( "In addition to dedicated modulators, Monstro allows oscillator 3 to be modulated by "
+									"the output of oscillator 2. "
+									"Mix mode means no modulation: the outputs of the oscillators are simply mixed together. " ) );
+	m_amButton -> setWhatsThis( tr( "In addition to dedicated modulators, Monstro allows oscillator 3 to be modulated by "
+									"the output of oscillator 2. "
+									"AM means amplitude modulation: Oscillator 3's amplitude (volume) is modulated by oscillator 2. " ) );
+	m_fmButton -> setWhatsThis( tr( "In addition to dedicated modulators, Monstro allows oscillator 3 to be modulated by "
+									"the output of oscillator 2. "
+									"FM means frequency modulation: Oscillator 3's frequency (pitch) is modulated by oscillator 2. "
+									"The frequency modulation is implemented as phase modulation, which gives a more stable overall pitch "
+									"than \"pure\" frequency modulation. " ) );
+	m_pmButton -> setWhatsThis( tr( "In addition to dedicated modulators, Monstro allows oscillator 3 to be modulated by "
+									"the output of oscillator 2. "
+									"PM means phase modulation: Oscillator 3's phase is modulated by oscillator 2. "
+									"It differs from frequency modulation in that the phase changes are not cumulative. " ) );
+	m_lfo1WaveBox -> setWhatsThis( tr( "Select the waveform for LFO 1. "
+										"\"Random\" and \"Random smooth\" are special waveforms: "
+										"they produce random output, where the rate of the LFO controls how often "
+										"the state of the LFO changes. The smooth version interpolates between these "
+										"states with cosine interpolation. These random modes can be used to give "
+										"\"life\" to your presets - add some of that analog unpredictability... " ) );
+	m_lfo2WaveBox -> setWhatsThis( tr( "Select the waveform for LFO 2. "
+										"\"Random\" and \"Random smooth\" are special waveforms: "
+										"they produce random output, where the rate of the LFO controls how often "
+										"the state of the LFO changes. The smooth version interpolates between these "
+										"states with cosine interpolation. These random modes can be used to give "
+										"\"life\" to your presets - add some of that analog unpredictability... " ) );
+	m_lfo1AttKnob -> setWhatsThis( tr( "Attack causes the LFO to come on gradually from the start of the note. " ) );
+	m_lfo2AttKnob -> setWhatsThis( tr( "Attack causes the LFO to come on gradually from the start of the note. " ) );
+	m_lfo1RateKnob -> setWhatsThis( tr( "Rate sets the speed of the LFO, measured in milliseconds per cycle. Can be synced to tempo. " ) );
+	m_lfo2RateKnob -> setWhatsThis( tr( "Rate sets the speed of the LFO, measured in milliseconds per cycle. Can be synced to tempo. " ) );
+	m_lfo1PhsKnob -> setWhatsThis( tr( "PHS controls the phase offset of the LFO. " ) );
+	m_lfo2PhsKnob -> setWhatsThis( tr( "PHS controls the phase offset of the LFO. " ) );
+	
+	m_env1PreKnob -> setWhatsThis( tr( "PRE, or pre-delay, delays the start of the envelope from the start of the note. 0 means no delay. " ) );
+	m_env2PreKnob -> setWhatsThis( tr( "PRE, or pre-delay, delays the start of the envelope from the start of the note. 0 means no delay. " ) );
+	m_env1AttKnob -> setWhatsThis( tr( "ATT, or attack, controls how fast the envelope ramps up at start, measured in milliseconds. "
+										"A value of 0 means instant. " ) );
+	m_env2AttKnob -> setWhatsThis( tr( "ATT, or attack, controls how fast the envelope ramps up at start, measured in milliseconds. "
+										"A value of 0 means instant. " ) );
+	m_env1HoldKnob -> setWhatsThis( tr( "HOLD controls how long the envelope stays at peak after the attack phase. " ) );
+	m_env2HoldKnob -> setWhatsThis( tr( "HOLD controls how long the envelope stays at peak after the attack phase. " ) );
+	m_env1DecKnob -> setWhatsThis( tr( "DEC, or decay, controls how fast the envelope falls off from its peak, measured in milliseconds "
+										"it would take to go from peak to zero. The actual decay may be shorter if sustain is used. ") );
+	m_env2DecKnob -> setWhatsThis( tr( "DEC, or decay, controls how fast the envelope falls off from its peak, measured in milliseconds "
+										"it would take to go from peak to zero. The actual decay may be shorter if sustain is used. ") );
+	m_env1SusKnob -> setWhatsThis( tr( "SUS, or sustain, controls the sustain level of the envelope. The decay phase will not go below this level "
+										"as long as the note is held. " ) );
+	m_env2SusKnob -> setWhatsThis( tr( "SUS, or sustain, controls the sustain level of the envelope. The decay phase will not go below this level "
+										"as long as the note is held. " ) );
+	m_env1RelKnob -> setWhatsThis( tr( "REL, or release, controls how long the release is for the note, measured in how long it would take to "
+										"fall from peak to zero. Actual release may be shorter, depending on at what phase the note is released. ") );
+	m_env2RelKnob -> setWhatsThis( tr( "REL, or release, controls how long the release is for the note, measured in how long it would take to "
+										"fall from peak to zero. Actual release may be shorter, depending on at what phase the note is released. ") );
+	m_env1SlopeKnob -> setWhatsThis( tr( "The slope knob controls the curve or shape of the envelope. A value of 0 creates straight rises and falls. "
+											"Negative values create curves that start slowly, peak quickly and fall of slowly again. "
+											"Positive values create curves that start and end quickly, and stay longer near the peaks. " ) );
+	m_env2SlopeKnob -> setWhatsThis( tr( "The slope knob controls the curve or shape of the envelope. A value of 0 creates straight rises and falls. "
+											"Negative values create curves that start slowly, peak quickly and fall of slowly again. "
+											"Positive values create curves that start and end quickly, and stay longer near the peaks. " ) );
 	return( view );
 }
 
diff --git a/plugins/monstro/exp.png b/plugins/monstro/exp.png
index 3f9cc47a0..9fe634881 100644
Binary files a/plugins/monstro/exp.png and b/plugins/monstro/exp.png differ
diff --git a/plugins/monstro/moog.png b/plugins/monstro/moog.png
index 1a657b161..6d9005966 100644
Binary files a/plugins/monstro/moog.png and b/plugins/monstro/moog.png differ
diff --git a/plugins/monstro/noise.png b/plugins/monstro/noise.png
index cd22af02b..6d3853f60 100644
Binary files a/plugins/monstro/noise.png and b/plugins/monstro/noise.png differ
diff --git a/plugins/monstro/ramp.png b/plugins/monstro/ramp.png
index 94f23b59f..dbd423efd 100644
Binary files a/plugins/monstro/ramp.png and b/plugins/monstro/ramp.png differ
diff --git a/plugins/monstro/rand.png b/plugins/monstro/rand.png
index b857b9882..96c4a49e3 100644
Binary files a/plugins/monstro/rand.png and b/plugins/monstro/rand.png differ
diff --git a/plugins/monstro/saw.png b/plugins/monstro/saw.png
index 7435f68aa..56c077f2c 100644
Binary files a/plugins/monstro/saw.png and b/plugins/monstro/saw.png differ
diff --git a/plugins/monstro/sin.png b/plugins/monstro/sin.png
index f9441bdfb..acabd5a17 100644
Binary files a/plugins/monstro/sin.png and b/plugins/monstro/sin.png differ
diff --git a/plugins/monstro/sinabs.png b/plugins/monstro/sinabs.png
index 067fa0ddb..2216224e6 100644
Binary files a/plugins/monstro/sinabs.png and b/plugins/monstro/sinabs.png differ
diff --git a/plugins/monstro/sqr.png b/plugins/monstro/sqr.png
index 47748c668..83d5e4869 100644
Binary files a/plugins/monstro/sqr.png and b/plugins/monstro/sqr.png differ
diff --git a/plugins/monstro/sqrsoft.png b/plugins/monstro/sqrsoft.png
index d04a73947..2e5626d20 100644
Binary files a/plugins/monstro/sqrsoft.png and b/plugins/monstro/sqrsoft.png differ
diff --git a/plugins/monstro/tri.png b/plugins/monstro/tri.png
index 9764a36e8..9e1ab8108 100644
Binary files a/plugins/monstro/tri.png and b/plugins/monstro/tri.png differ
diff --git a/src/core/FxMixer.cpp b/src/core/FxMixer.cpp
index d3622a6eb..77c12c13a 100644
--- a/src/core/FxMixer.cpp
+++ b/src/core/FxMixer.cpp
@@ -34,6 +34,34 @@
 #include "bb_track_container.h"
 #include "ValueBuffer.h"
 
+FxRoute::FxRoute( FxChannel * from, FxChannel * to, float amount ) :
+	m_from( from ),
+	m_to( to )
+{
+	//qDebug( "created: %d to %d", m_from->m_channelIndex, m_to->m_channelIndex );
+	// create send amount model
+	m_amount = new FloatModel( amount, 0, 1, 0.001, NULL,
+			tr( "Amount to send from channel %1 to channel %2" ).arg( m_from->m_channelIndex ).arg( m_to->m_channelIndex ) );
+}
+
+
+FxRoute::~FxRoute()
+{
+	// remove send model
+	delete m_amount;
+}
+
+
+void FxRoute::updateName()
+{
+	if( m_amount)
+	{
+		m_amount->setDisplayName( 
+			tr( "Amount to send from channel %1 to channel %2" ).arg( m_from->m_channelIndex ).arg( m_to->m_channelIndex ) );
+	}
+}
+
+
 FxChannel::FxChannel( int idx, Model * _parent ) :
 	m_fxChain( NULL ),
 	m_hasInput( false ),
@@ -65,7 +93,6 @@ FxChannel::~FxChannel()
 
 void FxChannel::doProcessing( sampleFrame * _buf )
 {
-	FxMixer * fxm = engine::fxMixer();
 	const fpp_t fpp = engine::mixer()->framesPerPeriod();
 
 	// <tobydox> ignore the passed _buf
@@ -77,17 +104,15 @@ void FxChannel::doProcessing( sampleFrame * _buf )
 	// <tobydox> this improves cache hit rate
 	_buf = m_buffer;
 
-	// SMF: OK, due to the fact, that the data from the audio-tracks has been
-	//			written into our buffer already, all which needs to be done at this
-	//			stage is to process inter-channel sends.
-
 	if( m_muteModel.value() == false )
 	{
 		// OK, we are not muted, so we go recursively through all the channels
 		// which send to us (our children)...
-		foreach( fx_ch_t senderIndex, m_receives )
+		foreach( FxRoute * senderRoute, m_receives )
 		{
-			FxChannel * sender = fxm->effectChannel( senderIndex );
+			FxChannel * sender = senderRoute->sender();
+			FloatModel * sendModel = senderRoute->amount();
+			if( ! sendModel ) qFatal( "Error: no send model found from %d to %d", senderRoute->senderIndex(), m_channelIndex );
 
 			// wait for the sender job - either it's just been queued yet,
 			// then ThreadableJob::process() will process it now within this
@@ -101,8 +126,8 @@ void FxChannel::doProcessing( sampleFrame * _buf )
 			if( sender->m_hasInput || sender->m_stillRunning )
 			{
 				// figure out if we're getting sample-exact input
-				ValueBuffer * sendBuf = fxm->channelSendModel( senderIndex, m_channelIndex )->hasSampleExactData()
-					? fxm->channelSendModel( senderIndex, m_channelIndex )->valueBuffer()
+				ValueBuffer * sendBuf = sendModel->hasSampleExactData()
+					? sendModel->valueBuffer()
 					: NULL;
 				ValueBuffer * volBuf = sender->m_volumeModel.hasSampleExactData()
 					? sender->m_volumeModel.valueBuffer()
@@ -114,7 +139,7 @@ void FxChannel::doProcessing( sampleFrame * _buf )
 				// use sample-exact mixing if sample-exact values are available
 				if( ! volBuf && ! sendBuf ) // neither volume nor send has sample-exact data...
 				{
-					const float v = sender->m_volumeModel.value() * fxm->channelSendModel( senderIndex, m_channelIndex )->value();
+					const float v = sender->m_volumeModel.value() * sendModel->value();
 					MixHelpers::addMultiplied( _buf, ch_buf, v, fpp );
 				}
 				else if( volBuf && sendBuf ) // both volume and send have sample-exact data
@@ -123,7 +148,7 @@ void FxChannel::doProcessing( sampleFrame * _buf )
 				}
 				else if( volBuf ) // volume has sample-exact data but send does not
 				{
-					const float v = fxm->channelSendModel( senderIndex, m_channelIndex )->value();
+					const float v = sendModel->value();
 					MixHelpers::addMultipliedByBuffer( _buf, ch_buf, v, volBuf, fpp );
 				}
 				else // vice versa
@@ -168,12 +193,12 @@ FxMixer::FxMixer() :
 
 FxMixer::~FxMixer()
 {
+	while( ! m_fxRoutes.isEmpty() )
+	{
+		deleteChannelSend( m_fxRoutes.first() );
+	}
 	for( int i = 0; i < m_fxChannels.size(); ++i )
 	{
-		for( int j = 0; j < m_fxChannels[i]->m_sendAmount.size(); ++j)
-		{
-			delete m_fxChannels[i]->m_sendAmount[j];
-		}
 		delete m_fxChannels[i];
 	}
 }
@@ -193,10 +218,12 @@ int FxMixer::createChannel()
 }
 
 
-void FxMixer::deleteChannel(int index)
+void FxMixer::deleteChannel( int index )
 {
 	m_fxChannels[index]->m_lock.lock();
 
+	FxChannel * ch = m_fxChannels[index];
+
 	// go through every instrument and adjust for the channel index change
 	TrackContainer::TrackList tracks;
 	tracks += engine::getSong()->tracks();
@@ -223,52 +250,34 @@ void FxMixer::deleteChannel(int index)
 	}
 
 	// delete all of this channel's sends and receives
-	while( ! m_fxChannels[index]->m_sends.isEmpty() )
+	while( ! ch->m_sends.isEmpty() )
 	{
-		deleteChannelSend( index, m_fxChannels[index]->m_sends.first() );
+		deleteChannelSend( ch->m_sends.first() );
 	}
-	while( ! m_fxChannels[index]->m_receives.isEmpty() )
+	while( ! ch->m_receives.isEmpty() )
 	{
-		deleteChannelSend( m_fxChannels[index]->m_receives.first(), index );
-	}
-
-	for(int i=0; i<m_fxChannels.size(); ++i)
-	{
-		// for every send/receive, adjust for the channel index change
-		for(int j=0; j<m_fxChannels[i]->m_sends.size(); ++j)
-		{
-			if( m_fxChannels[i]->m_sends[j] > index )
-			{
-				// subtract 1 to make up for the missing channel
-				--m_fxChannels[i]->m_sends[j];
-			}
-		}
-		for(int j=0; j<m_fxChannels[i]->m_receives.size(); ++j)
-		{
-			if( m_fxChannels[i]->m_receives[j] > index )
-			{
-				// subtract 1 to make up for the missing channel
-				--m_fxChannels[i]->m_receives[j];
-			}
-		}
-
+		deleteChannelSend( ch->m_receives.first() );
 	}
 
 	// actually delete the channel
 	delete m_fxChannels[index];
 	m_fxChannels.remove(index);
+	
+	for( int i = index; i < m_fxChannels.size(); ++i )
+	{
+		validateChannelName( i, i + 1 );
+	}
 }
 
 
 
-void FxMixer::moveChannelLeft(int index)
+void FxMixer::moveChannelLeft( int index )
 {
 	// can't move master or first channel
 	if( index <= 1 || index >= m_fxChannels.size() )
 	{
 		return;
 	}
-	m_sendsMutex.lock();
 	// channels to swap
 	int a = index - 1, b = index;
 
@@ -299,122 +308,132 @@ void FxMixer::moveChannelLeft(int index)
 		}
 	}
 
-	for(int i=0; i<m_fxChannels.size(); ++i)
-	{
-		// for every send/receive, adjust for the channel index change
-		for(int j=0; j<m_fxChannels[i]->m_sends.size(); ++j)
-		{
-			if( m_fxChannels[i]->m_sends[j] == a )
-			{
-				m_fxChannels[i]->m_sends[j] = b;
-			}
-			else if( m_fxChannels[i]->m_sends[j] == b )
-			{
-				m_fxChannels[i]->m_sends[j] = a;
-			}
-		}
-		for(int j=0; j<m_fxChannels[i]->m_receives.size(); ++j)
-		{
-			if( m_fxChannels[i]->m_receives[j] == a )
-			{
-				m_fxChannels[i]->m_receives[j] = b;
-			}
-			else if( m_fxChannels[i]->m_receives[j] == b )
-			{
-				m_fxChannels[i]->m_receives[j] = a;
-			}
-		}
-	}
-
 	// actually do the swap
 	FxChannel * tmpChannel = m_fxChannels[a];
 	m_fxChannels[a] = m_fxChannels[b];
 	m_fxChannels[b] = tmpChannel;
-	m_sendsMutex.unlock();
+	
+	validateChannelName( a, b );
+	validateChannelName( b, a );
 }
 
 
 
-void FxMixer::moveChannelRight(int index)
+void FxMixer::moveChannelRight( int index )
 {
-	moveChannelLeft(index+1);
+	moveChannelLeft( index + 1 );
 }
 
 
 
-void FxMixer::createChannelSend(fx_ch_t fromChannel, fx_ch_t toChannel,
-								float amount)
+void FxMixer::createChannelSend( fx_ch_t fromChannel, fx_ch_t toChannel,
+								float amount )
 {
+//	qDebug( "requested: %d to %d", fromChannel, toChannel );
 	// find the existing connection
 	FxChannel * from = m_fxChannels[fromChannel];
-	for(int i=0; i<from->m_sends.size(); ++i){
-		if( from->m_sends[i] == toChannel )
+	FxChannel * to = m_fxChannels[toChannel];
+
+	for( int i=0; i<from->m_sends.size(); ++i )
+	{
+		if( from->m_sends[i]->receiver() == to )
 		{
 			// simply adjust the amount
-			from->m_sendAmount[i]->setValue(amount);
+			from->m_sends[i]->amount()->setValue( amount );
 			return;
 		}
 	}
 
 	// connection does not exist. create a new one
-	m_sendsMutex.lock();
-	// add to from's sends
-	from->m_sends.push_back(toChannel);
-	from->m_sendAmount.push_back(new FloatModel(amount, 0, 1, 0.001, NULL,
-												tr("Amount to send")));
+	createRoute( from, to, amount );
+}
 
-	// add to to's receives
-	m_fxChannels[toChannel]->m_receives.push_back(fromChannel);
+
+void FxMixer::createRoute( FxChannel * from, FxChannel * to, float amount )
+{
+	if( from == to )
+	{
+		return;
+	}
+	m_sendsMutex.lock();
+	FxRoute * route = new FxRoute( from, to, amount );
+	
+	// add us to from's sends
+	from->m_sends.append( route );
+	
+	// add us to to's receives
+	to->m_receives.append( route );
+	
+	// add us to fxmixer's list
+	engine::fxMixer()->m_fxRoutes.append( route );
 	m_sendsMutex.unlock();
 }
 
 
-
 // delete the connection made by createChannelSend
-void FxMixer::deleteChannelSend(fx_ch_t fromChannel, fx_ch_t toChannel)
+void FxMixer::deleteChannelSend( fx_ch_t fromChannel, fx_ch_t toChannel )
 {
 	// delete the send
 	FxChannel * from = m_fxChannels[fromChannel];
 	FxChannel * to	 = m_fxChannels[toChannel];
-	m_sendsMutex.lock();
-	// find and delete the send entry
-	for(int i=0; i<from->m_sends.size(); ++i) {
-		if( from->m_sends[i] == toChannel )
-		{
-			// delete this index
-			delete from->m_sendAmount[i];
-			from->m_sendAmount.remove(i);
-			from->m_sends.remove(i);
-			break;
-		}
-	}
 
-	// find and delete the receive entry
-	for(int i=0; i<to->m_receives.size(); ++i)
+	// find and delete the send entry
+	for( int i = 0; i < from->m_sends.size(); ++i )
 	{
-		if( to->m_receives[i] == fromChannel )
+		if( from->m_sends[i]->receiver() == to )
 		{
-			// delete this index
-			to->m_receives.remove(i);
+			deleteChannelSend( from->m_sends[i] );
 			break;
 		}
 	}
+}
+
+
+void FxMixer::deleteChannelSend( FxRoute * route )
+{
+	m_sendsMutex.lock();
+	// remove us from from's sends
+	route->sender()->m_sends.remove( route->sender()->m_sends.indexOf( route ) );
+	// remove us from to's receives
+	route->receiver()->m_receives.remove( route->receiver()->m_receives.indexOf( route ) );
+	// remove us from fxmixer's list
+	engine::fxMixer()->m_fxRoutes.remove( engine::fxMixer()->m_fxRoutes.indexOf( route ) );
+	delete route;
 	m_sendsMutex.unlock();
 }
 
 
-bool FxMixer::isInfiniteLoop(fx_ch_t sendFrom, fx_ch_t sendTo) {
+bool FxMixer::isInfiniteLoop( fx_ch_t sendFrom, fx_ch_t sendTo )
+{
+	if( sendFrom == sendTo ) return true;
+	//m_sendsMutex.lock();
+	FxChannel * from = m_fxChannels[sendFrom];
+	FxChannel * to = m_fxChannels[sendTo];
+	bool b = checkInfiniteLoop( from, to );
+	//m_sendsMutex.unlock();
+	return b;
+}
+
+
+bool FxMixer::checkInfiniteLoop( FxChannel * from, FxChannel * to )
+{
 	// can't send master to anything
-	if( sendFrom == 0 ) return true;
+	if( from == m_fxChannels[0] ) 
+	{ 
+		return true;
+	}
 
 	// can't send channel to itself
-	if( sendFrom == sendTo ) return true;
+	if( from == to ) 
+	{
+		return true;
+	}
 
 	// follow sendTo's outputs recursively looking for something that sends
 	// to sendFrom
-	for(int i=0; i<m_fxChannels[sendTo]->m_sends.size(); ++i)
+	for( int i=0; i < to->m_sends.size(); ++i )
 	{
-		if( isInfiniteLoop( sendFrom, m_fxChannels[sendTo]->m_sends[i] ) )
+		if( checkInfiniteLoop( from, to->m_sends[i]->receiver() ) )
 		{
 			return true;
 		}
@@ -425,13 +444,23 @@ bool FxMixer::isInfiniteLoop(fx_ch_t sendFrom, fx_ch_t sendTo) {
 
 
 // how much does fromChannel send its output to the input of toChannel?
-FloatModel * FxMixer::channelSendModel(fx_ch_t fromChannel, fx_ch_t toChannel)
+FloatModel * FxMixer::channelSendModel( fx_ch_t fromChannel, fx_ch_t toChannel )
 {
-	FxChannel * from = m_fxChannels[fromChannel];
-	for(int i=0; i<from->m_sends.size(); ++i){
-		if( from->m_sends[i] == toChannel )
-			return from->m_sendAmount[i];
+	if( fromChannel == toChannel )
+	{
+		return NULL;
 	}
+	FxChannel * from = m_fxChannels[fromChannel];
+	FxChannel * to = m_fxChannels[toChannel];
+
+	foreach( FxRoute * route, from->m_sends )
+	{
+		if( route->receiver() == to )
+		{
+			return route->amount();
+		}
+	}
+
 	return NULL;
 }
 
@@ -439,15 +468,6 @@ FloatModel * FxMixer::channelSendModel(fx_ch_t fromChannel, fx_ch_t toChannel)
 
 void FxMixer::mixToChannel( const sampleFrame * _buf, fx_ch_t _ch )
 {
-	// SMF: it seems like here the track-channels are mixed in... but from where
-	//			is this called and when and why...?!?
-	//
-	//			OK, found it (git grep is your friend...): This is the next part,
-	//			where there is a mix between push and pull model inside the core, as
-	//			the audio-tracks *push* their data into the fx-channels hopefully just
-	//			before the Mixer-Channels are processed... Sorry to say this: but this
-	//			took me senseless hours to find out and is silly, too...
-
 	if( m_fxChannels[_ch]->m_muteModel.value() == false )
 	{
 		m_fxChannels[_ch]->m_lock.lock();
@@ -468,24 +488,22 @@ void FxMixer::prepareMasterMix()
 
 
 
-void FxMixer::addChannelLeaf( int _ch, sampleFrame * _buf )
+void FxMixer::addChannelLeaf( FxChannel * ch, sampleFrame * buf )
 {
-	FxChannel * thisCh = m_fxChannels[_ch];
-
 	// if we're muted or this channel is seen already, discount it
-	if( thisCh->m_queued )
+	if( ch->m_queued )
 	{
 		return;
 	}
 
-	foreach( const int senderIndex, thisCh->m_receives )
+	foreach( FxRoute * senderRoute, ch->m_receives )
 	{
-		addChannelLeaf( senderIndex, _buf );
+		addChannelLeaf( senderRoute->sender(), buf );
 	}
 
 	// add this channel to job list
-	thisCh->m_queued = true;
-	MixerWorkerThread::addJob( thisCh );
+	ch->m_queued = true;
+	MixerWorkerThread::addJob( ch );
 }
 
 
@@ -498,15 +516,14 @@ void FxMixer::masterMix( sampleFrame * _buf )
 	// and add all channels to job list that have no dependencies
 	// when the channel completes it will check its parent to see if it needs
 	// to be processed.
-	m_sendsMutex.lock();
+	//m_sendsMutex.lock();
 	MixerWorkerThread::resetJobQueue( MixerWorkerThread::JobQueue::Dynamic );
-	addChannelLeaf( 0, _buf );
+	addChannelLeaf( m_fxChannels[0], _buf );
 	while( m_fxChannels[0]->state() != ThreadableJob::Done )
 	{
 		MixerWorkerThread::startAndWaitForJobs();
 	}
-	//m_fxChannels[0]->doProcessing( NULL );
-	m_sendsMutex.unlock();
+	//m_sendsMutex.unlock();
 
 	// handle sample-exact data in master volume fader
 	ValueBuffer * volBuf = m_fxChannels[0]->m_volumeModel.hasSampleExactData()
@@ -564,7 +581,7 @@ void FxMixer::clearChannel(fx_ch_t index)
 	ch->m_volumeModel.setValue( 1.0f );
 	ch->m_muteModel.setValue( false );
 	ch->m_name = ( index == 0 ) ? tr( "Master" ) : tr( "FX %1" ).arg( index );
-	ch->m_volumeModel.setDisplayName(ch->m_name );
+	ch->m_volumeModel.setDisplayName( ch->m_name );
 
 	// send only to master
 	if( index > 0)
@@ -572,17 +589,17 @@ void FxMixer::clearChannel(fx_ch_t index)
 		// delete existing sends
 		while( ! ch->m_sends.isEmpty() )
 		{
-			deleteChannelSend( index, ch->m_sends.first() );
+			deleteChannelSend( ch->m_sends.first() );
 		}
 
 		// add send to master
-		createChannelSend(index, 0);
+		createChannelSend( index, 0 );
 	}
 
 	// delete receives
 	while( ! ch->m_receives.isEmpty() )
 	{
-		deleteChannelSend( ch->m_receives.first(), index );
+		deleteChannelSend( ch->m_receives.first() );
 	}
 }
 
@@ -607,8 +624,8 @@ void FxMixer::saveSettings( QDomDocument & _doc, QDomElement & _this )
 			QDomElement sendsDom = _doc.createElement( QString( "send" ) );
 			fxch.appendChild( sendsDom );
 
-			sendsDom.setAttribute( "channel", ch->m_sends[si] );
-			ch->m_sendAmount[si]->saveSettings( _doc, sendsDom, "amount");
+			sendsDom.setAttribute( "channel", ch->m_sends[si]->receiverIndex() );
+			ch->m_sends[si]->amount()->saveSettings( _doc, sendsDom, "amount" );
 		}
 	}
 }
@@ -621,7 +638,7 @@ void FxMixer::allocateChannelsTo(int num)
 		createChannel();
 
 		// delete the default send to master
-		deleteChannelSend(m_fxChannels.size()-1, 0);
+		deleteChannelSend( m_fxChannels.size()-1, 0 );
 	}
 }
 
@@ -658,7 +675,7 @@ void FxMixer::loadSettings( const QDomElement & _this )
 			{
 				thereIsASend = true;
 				int sendTo = chDataItem.attribute( "channel" ).toInt();
-				allocateChannelsTo( sendTo) ;
+				allocateChannelsTo( sendTo ) ;
 				float amount = chDataItem.attribute( "amount" ).toFloat();
 				createChannelSend( num, sendTo, amount );
 			}
@@ -674,10 +691,31 @@ void FxMixer::loadSettings( const QDomElement & _this )
 		// create a send from every channel into master
 		for( int i=1; i<m_fxChannels.size(); ++i )
 		{
-			createChannelSend(i, 0);
+			createChannelSend( i, 0 );
 		}
 	}
 
 	emit dataChanged();
 }
 
+
+void FxMixer::validateChannelName( int index, int oldIndex )
+{
+	FxChannel * fxc = m_fxChannels[ index ];
+	if( fxc->m_name == tr( "FX %1" ).arg( oldIndex ) )
+	{
+		fxc->m_name = tr( "FX %1" ).arg( index );
+	}
+	// set correct channel index
+	fxc->m_channelIndex = index;
+
+	// now check all routes and update names of the send models
+	foreach( FxRoute * r, fxc->m_sends )
+	{
+		r->updateName();
+	}
+	foreach( FxRoute * r, fxc->m_receives )
+	{
+		r->updateName();
+	}
+}
diff --git a/src/gui/FxMixerView.cpp b/src/gui/FxMixerView.cpp
index f55112e26..86c6c735d 100644
--- a/src/gui/FxMixerView.cpp
+++ b/src/gui/FxMixerView.cpp
@@ -121,7 +121,7 @@ FxMixerView::FxMixerView() :
 	channelArea->setMinimumWidth( fxLineSize.width() * 6 );
 	channelArea->setFixedHeight( fxLineSize.height() +
 			style()->pixelMetric( QStyle::PM_ScrollBarExtent ) );
-	ml->addWidget(channelArea);
+	ml->addWidget( channelArea, 1, Qt::AlignTop );
 
 	// show the add new effect channel button
 	QPushButton * newChannelBtn = new QPushButton( embed::getIconPixmap( "new_channel" ), QString::null, this );
@@ -132,7 +132,7 @@ FxMixerView::FxMixerView() :
 
 
 	// add the stacked layout for the effect racks of fx channels 
-	ml->addWidget( m_racksWidget, 0, Qt::AlignTop );
+	ml->addWidget( m_racksWidget, 0, Qt::AlignTop | Qt::AlignRight );
 	
 	setCurrentFxLine( m_fxChannelViews[0]->m_fxLine );
 
diff --git a/src/gui/widgets/FxLine.cpp b/src/gui/widgets/FxLine.cpp
index ac051d799..ea8f6353d 100644
--- a/src/gui/widgets/FxLine.cpp
+++ b/src/gui/widgets/FxLine.cpp
@@ -40,12 +40,23 @@
 #include "caption_menu.h"
 
 const int FxLine::FxLineHeight = 287;
+QPixmap * FxLine::s_sendBgArrow = NULL;
+QPixmap * FxLine::s_receiveBgArrow = NULL;
 
 FxLine::FxLine( QWidget * _parent, FxMixerView * _mv, int _channelIndex) :
 	QWidget( _parent ),
 	m_mv( _mv ),
 	m_channelIndex( _channelIndex )
 {
+	if( ! s_sendBgArrow )
+	{
+		s_sendBgArrow = new QPixmap( embed::getIconPixmap( "send_bg_arrow", 29, 56 ) );
+	}
+	if( ! s_receiveBgArrow )
+	{
+		s_receiveBgArrow = new QPixmap( embed::getIconPixmap( "receive_bg_arrow", 29, 56 ) );
+	}
+
 	setFixedSize( 33, FxLineHeight );
 	setAttribute( Qt::WA_OpaquePaintEvent, true );
 	setCursor( QCursor( embed::getIconPixmap( "hand" ), 0, 0 ) );
@@ -97,7 +108,7 @@ void FxLine::setChannelIndex(int index) {
 }
 
 
-static void drawFxLine( QPainter* p, const FxLine *fxLine, const QString& name, bool isActive, bool sendToThis )
+void FxLine::drawFxLine( QPainter* p, const FxLine *fxLine, const QString& name, bool isActive, bool sendToThis, bool receiveFromThis )
 {
 	int width = fxLine->rect().width();
 	int height = fxLine->rect().height();
@@ -111,10 +122,7 @@ static void drawFxLine( QPainter* p, const FxLine *fxLine, const QString& name,
 
 	p->fillRect( fxLine->rect(), isActive ? fxLine->backgroundActive() : p->background() );
 
-	p->setPen( QColor( 0, 0, 0, 75 ) );
-	p->drawRect( 0, 0, width-2, height-2 );
-
-	p->setPen( QColor( 255, 255, 255, 75 ) );
+	p->setPen( QColor( 255, 255, 255, isActive ? 100 : 50 ) );
 	p->drawRect( 1, 1, width-3, height-3 );
 
 	p->setPen( isActive ? sh_color : QColor( 0, 0, 0, 50 ) );
@@ -123,8 +131,11 @@ static void drawFxLine( QPainter* p, const FxLine *fxLine, const QString& name,
 	// draw the mixer send background
 	if( sendToThis )
 	{
-		p->drawPixmap( 3, 0, 28, 56,
-					  embed::getIconPixmap("send_bg_arrow", 28, 56 ) );
+		p->drawPixmap( 2, 0, 29, 56, *s_sendBgArrow );
+	}
+	else if( receiveFromThis )
+	{
+		p->drawPixmap( 2, 0, 29, 56, *s_receiveBgArrow );
 	}
 
 	// draw the channel name
@@ -145,12 +156,14 @@ void FxLine::paintEvent( QPaintEvent * )
 {
 	FxMixer * mix = engine::fxMixer();
 	bool sendToThis = mix->channelSendModel(
-		m_mv->currentFxLine()->m_channelIndex, m_channelIndex) != NULL;
+		m_mv->currentFxLine()->m_channelIndex, m_channelIndex ) != NULL;
+	bool receiveFromThis = mix->channelSendModel(
+		m_channelIndex, m_mv->currentFxLine()->m_channelIndex ) != NULL;
 	QPainter painter;
 	painter.begin( this );
 	drawFxLine( &painter, this,
-		mix->effectChannel(m_channelIndex)->m_name,
-		m_mv->currentFxLine() == this, sendToThis );
+		mix->effectChannel( m_channelIndex )->m_name,
+		m_mv->currentFxLine() == this, sendToThis, receiveFromThis );
 	painter.end();
 }