diff --git a/MicroDexed.ino b/MicroDexed.ino
index f935b44..62166ce 100644
--- a/MicroDexed.ino
+++ b/MicroDexed.ino
@@ -73,6 +73,10 @@ AudioAmplifier             volume_l;
 AudioEffectStereoMono      stereo2mono;
 AudioAnalyzePeak           master_peak_r;
 AudioAnalyzePeak           master_peak_l;
+#if defined(TEENSY_AUDIO_BOARD) && defined(SGTL5000_AUDIO_THRU)
+AudioMixer4                audio_thru_mixer_r;
+AudioMixer4                audio_thru_mixer_l;
+#endif
 
 // Audio chain tail
 #if defined(USE_FX)
@@ -98,8 +102,10 @@ AudioConnection          patchCord11(stereo2mono, 0, master_peak_l, 0);
 // Outputs
 #if defined(TEENSY_AUDIO_BOARD)
 AudioOutputI2S           i2s1;
+#ifndef SGTL5000_AUDIO_THRU
 AudioConnection          patchCord12(stereo2mono, 0, i2s1, 0);
 AudioConnection          patchCord13(stereo2mono, 1, i2s1, 1);
+#endif
 AudioControlSGTL5000     sgtl5000_1;
 #elif defined (I2S_AUDIO_ONLY)
 AudioOutputI2S           i2s1;
@@ -130,10 +136,15 @@ AudioOutputUSB           usb1;
 AudioConnection          patchCord15(stereo2mono, 0, usb1, 0);
 AudioConnection          patchCord16(stereo2mono, 1, usb1, 1);
 #endif
-#ifdef SGTL5000_AUDIO_THRU
+
+#if defined(TEENSY_AUDIO_BOARD) && defined(SGTL5000_AUDIO_THRU)
 AudioInputI2S            i2s1in;
-AudioConnection          patchCord17(i2s1in, 0, master_mixer_r, 2);
-AudioConnection          patchCord18(i2s1in, 1, master_mixer_l, 2);
+AudioConnection          patchCord17(stereo2mono, 0, audio_thru_mixer_r, 0);
+AudioConnection          patchCord18(stereo2mono, 1, audio_thru_mixer_l, 0);
+AudioConnection          patchCord19(i2s1in, 0, audio_thru_mixer_r, 1);
+AudioConnection          patchCord20(i2s1in, 1, audio_thru_mixer_l, 1);
+AudioConnection          patchCord21(audio_thru_mixer_r, 0, i2s1, 0);
+AudioConnection          patchCord22(audio_thru_mixer_l, 0, i2s1, 1);
 #endif
 
 //
@@ -301,6 +312,7 @@ void setup()
   sgtl5000_1.audioProcessorDisable();
   sgtl5000_1.audioPostProcessorEnable();
 #ifdef SGTL5000_AUDIO_THRU
+  sgtl5000_1.audioPreProcessorEnable();
   sgtl5000_1.inputSelect(AUDIO_INPUT_LINEIN);
   sgtl5000_1.lineInLevel(5);
   sgtl5000_1.adcHighPassFilterEnable();
@@ -472,18 +484,29 @@ void setup()
 #else
   master_mixer_r.gain(0, 1.0);
   master_mixer_l.gain(0, 1.0);
+  master_mixer_r.gain(1, 0.0);
+  master_mixer_l.gain(1, 0.0);
 #endif
+  master_mixer_r.gain(2, 0.0);
+  master_mixer_l.gain(2, 0.0);
+  master_mixer_r.gain(3, 0.0);
+  master_mixer_l.gain(3, 0.0);
+
+#if defined(TEENSY_AUDIO_BOARD) && defined(SGTL5000_AUDIO_THRU)
+  audio_thru_mixer_r.gain(0, 1.0); // MD signal sum
+  audio_thru_mixer_l.gain(0, 1.0); // MD signal sum
 #ifdef TEENSY_AUDIO_BOARD
-#ifdef SGTL5000_AUDIO_THRU
-  master_mixer_r.gain(2, 1.0); // I2S Input
-  master_mixer_l.gain(2, 1.0); // I2S Input
+  audio_thru_mixer_r.gain(1, 1.0); // I2S nput
+  audio_thru_mixer_l.gain(1, 1.0); // I2S input
 #else
-  master_mixer_r.gain(2, 0.0); // I2S Input
-  master_mixer_l.gain(2, 0.0); // I2S Input
+  audio_thru_mixer_r.gain(1, 0.0);
+  audio_thru_mixer_l.gain(1, 0.0);
 #endif
+  audio_thru_mixer_r.gain(2, 0.0);
+  audio_thru_mixer_l.gain(2, 0.0);
+  audio_thru_mixer_r.gain(3, 0.0);
+  audio_thru_mixer_l.gain(3, 0.0);
 #endif
-  master_mixer_r.gain(3, 0.0);
-  master_mixer_l.gain(3, 0.0);
 
   //AudioInterrupts();
 
diff --git a/config.h b/config.h
index 03559f3..28aeb10 100644
--- a/config.h
+++ b/config.h
@@ -56,7 +56,7 @@
 // sed -i.orig 's/^#define USB_MIDI_SYSEX_MAX 290/#define USB_MIDI_SYSEX_MAX 4104/' /usr/local/arduino-teensy/hardware/teensy/avr/cores/teensy3/usb_midi.h
 //#define USB_MIDI_SYSEX_MAX 4104
 
-#define VERSION "1.0.5"
+#define VERSION "1.0.6"
 
 //*************************************************************************************************
 //* DEVICE SETTINGS
@@ -116,9 +116,10 @@
 // SGTL5000
 #ifdef TEENSY_AUDIO_BOARD
 #define SGTL5000_AUDIO_ENHANCE 1
-#define SGTL5000_AUDIO_THRU 1
+//#define SGTL5000_AUDIO_THRU 1
 #define SGTL5000_HEADPHONE_VOLUME 0.8
 #endif
+
 //*************************************************************************************************
 //* AUDIO SOFTWARE SETTINGS
 //*************************************************************************************************
@@ -296,9 +297,9 @@
 #   endif
 #  else
 #   if F_CPU == 256000000
-#    define MAX_NOTES 9
+#    define MAX_NOTES 8
 #   elif F_CPU == 216000000
-#    define MAX_NOTES 7
+#    define MAX_NOTES 6
 #   else
 #    define MAX_NOTES 5
 #   endif
diff --git a/doc/manuals/Build-Manual.pdf b/doc/manuals/Build-Manual.pdf
index 7e68233..e5bb8b8 100644
Binary files a/doc/manuals/Build-Manual.pdf and b/doc/manuals/Build-Manual.pdf differ
diff --git a/doc/manuals/MicroDexed-User_Manual/MicroDexed-User_Manual.md b/doc/manuals/MicroDexed-User_Manual/MicroDexed-User_Manual.md
index 20977ce..f6f8f0a 100644
--- a/doc/manuals/MicroDexed-User_Manual/MicroDexed-User_Manual.md
+++ b/doc/manuals/MicroDexed-User_Manual/MicroDexed-User_Manual.md
@@ -4,7 +4,7 @@ fontsize: 14pt
 geometry: a4paper,margin=2cm
 ---
 
-![](../../images/Logo/MicroDexed_logo_1.5mm_black_rounded.svg)
+![](../../images/Logo/MicroDexed_logo_black.svg)
 
 # MicroDexed User Manual
 
@@ -37,7 +37,7 @@ For the original Dexed/msfa software take a look at [Dexed on Github](https://gi
 	* Delay (mono, up to 500ms, with feedback)
 	* Low-pass filter with resonance
 	* Reverb (stereo)
-	* Resonant low-pass filter 
+	* Resonant low-pass filter
 * Mono sound engine with panorama controller before reverb
 * Up to 20 voices of polyphony
 * Up to 100 banks of 32 voices can be stored on an SD card