diff --git a/MicroDexed.ino b/MicroDexed.ino
index 1c45004..9df2d4f 100644
--- a/MicroDexed.ino
+++ b/MicroDexed.ino
@@ -414,120 +414,120 @@ void loop()
   //while (42 == 42)
   //{
 #ifdef OLD
-    // Main sound calculation
-    if (queue1.available() && fill_audio_buffer > audio_block_time_us - 10)
-    {
-      fill_audio_buffer = 0;
+  // Main sound calculation
+  if (queue1.available() && fill_audio_buffer > audio_block_time_us - 10)
+  {
+    fill_audio_buffer = 0;
 
-      audio_buffer = queue1.getBuffer();
+    audio_buffer = queue1.getBuffer();
 
-      elapsedMicros t1;
-      for (uint8_t i = 0; i < NUM_DEXED; i++)
-      {
-        MicroDexed[i]->getSamples(AUDIO_BLOCK_SAMPLES, audio_buffer);
-      }
-      if (t1 > audio_block_time_us) // everything greater 2.9ms is a buffer underrun!
-        xrun++;
-      if (t1 > render_time_max)
-        render_time_max = t1;
-      if (peak1.available())
-      {
-        if (peak1.read() > 0.99)
-          peak++;
-      }
-      queue1.playBuffer();
+    elapsedMicros t1;
+    for (uint8_t i = 0; i < NUM_DEXED; i++)
+    {
+      MicroDexed[i]->getSamples(AUDIO_BLOCK_SAMPLES, audio_buffer);
     }
-#endif
-
-    // EEPROM update handling
-    if (autostore >= AUTOSTORE_MS && active_voices == 0 && eeprom_update_flag == true)
+    if (t1 > audio_block_time_us) // everything greater 2.9ms is a buffer underrun!
+      xrun++;
+    if (t1 > render_time_max)
+      render_time_max = t1;
+    if (peak1.available())
     {
-      // only store configuration data to EEPROM when AUTOSTORE_MS is reached and no voices are activated anymore
-      eeprom_update();
+      if (peak1.read() > 0.99)
+        peak++;
     }
+    queue1.playBuffer();
+  }
+#endif
 
-    // MIDI input handling
-    check_midi_devices();
+  // EEPROM update handling
+  if (autostore >= AUTOSTORE_MS && active_voices == 0 && eeprom_update_flag == true)
+  {
+    // only store configuration data to EEPROM when AUTOSTORE_MS is reached and no voices are activated anymore
+    eeprom_update();
+  }
 
-    // CONTROL-RATE-EVENT-HANDLING
-    if (control_rate > CONTROL_RATE_MS)
-    {
+  // MIDI input handling
+  check_midi_devices();
+
+  // CONTROL-RATE-EVENT-HANDLING
+  if (control_rate > CONTROL_RATE_MS)
+  {
 #ifdef ENABLE_LCD_UI
-      // LCD Menu
-      LCDML.loop();
+    // LCD Menu
+    LCDML.loop();
 
-      // initial starts voice selection menu as default
-      if (menu_state == MENU_START)
-      {
-        menu_state = MENU_VOICE;
-        UI_func_voice_selection(0);
-      }
+    // initial starts voice selection menu as default
+    if (menu_state == MENU_START)
+    {
+      menu_state = MENU_VOICE;
+      UI_func_voice_selection(0);
+    }
 #endif
-      control_rate = 0;
+    control_rate = 0;
 
-      // check for value changes and unused voices
-      soften_volume.tick();
+    // check for value changes and unused voices
+    soften_volume.tick();
 
-      for (uint8_t i = 0; i < NUM_DEXED; i++)
-      {
-        active_voices = MicroDexed[i]->getNumNotesPlaying();
+    for (uint8_t i = 0; i < NUM_DEXED; i++)
+    {
+      active_voices = MicroDexed[i]->getNumNotesPlaying();
 
-        soften_filter_res[i].tick();
-        soften_filter_cut[i].tick();
+      soften_filter_res[i].tick();
+      soften_filter_cut[i].tick();
 
-        if (soften_filter_res[i].running())
-        {
-          // soften filter resonance value
-          MicroDexed[i]->fx.Reso = soften_filter_res[i].value();
+      if (soften_filter_res[i].running())
+      {
+        // soften filter resonance value
+        MicroDexed[i]->fx.Reso = soften_filter_res[i].value();
 
 #ifdef DEBUG
-          Serial.print(F("Filter-Resonance: "));
-          Serial.print(MicroDexed[i]->fx.Reso, 5);
-          Serial.print(F(" Filter-Resonance step: "));
-          Serial.print(soften_filter_res[i].steps());
-          Serial.print(F(" Filter-Resonance diff: "));
-          Serial.println(soften_filter_res[i].diff(), 5);
+        Serial.print(F("Filter-Resonance: "));
+        Serial.print(MicroDexed[i]->fx.Reso, 5);
+        Serial.print(F(" Filter-Resonance step: "));
+        Serial.print(soften_filter_res[i].steps());
+        Serial.print(F(" Filter-Resonance diff: "));
+        Serial.println(soften_filter_res[i].diff(), 5);
 #endif
-        }
-        // soften filter cutoff value
-        if (soften_filter_cut[i].running())
-        {
-          MicroDexed[i]->fx.Cutoff = soften_filter_cut[i].value();
-#ifdef DEBUG
-          Serial.print(F("Filter-Cutoff: "));
-          Serial.print(MicroDexed[i]->fx.Cutoff, 5);
-          Serial.print(F(" Filter-Cutoff step: "));
-          Serial.print(soften_filter_cut[i].steps());
-          Serial.print(F(" Filter-Cutoff diff: "));
-          Serial.println(soften_filter_cut[i].diff(), 5);
-#endif
-        }
       }
-      if (soften_volume.running())
+      // soften filter cutoff value
+      if (soften_filter_cut[i].running())
       {
-        set_volume(soften_volume.value(), configuration.pan, configuration.mono);
+        MicroDexed[i]->fx.Cutoff = soften_filter_cut[i].value();
 #ifdef DEBUG
-        Serial.print(F("Volume: "));
-        Serial.print(configuration.vol, DEC);
-        Serial.print(F(" step: "));
-        Serial.print(soften_volume.steps());
-        Serial.print(F(" diff: "));
-        Serial.println(soften_volume.diff(), 5);
+        Serial.print(F("Filter-Cutoff: "));
+        Serial.print(MicroDexed[i]->fx.Cutoff, 5);
+        Serial.print(F(" Filter-Cutoff step: "));
+        Serial.print(soften_filter_cut[i].steps());
+        Serial.print(F(" Filter-Cutoff diff: "));
+        Serial.println(soften_filter_cut[i].diff(), 5);
 #endif
       }
     }
+    if (soften_volume.running())
+    {
+      set_volume(soften_volume.value(), configuration.pan, configuration.mono);
+#ifdef DEBUG
+      Serial.print(F("Volume: "));
+      Serial.print(configuration.vol, DEC);
+      Serial.print(F(" step: "));
+      Serial.print(soften_volume.steps());
+      Serial.print(F(" diff: "));
+      Serial.println(soften_volume.diff(), 5);
+#endif
+    }
+  }
 
 #if defined (DEBUG) && defined (SHOW_CPU_LOAD_MSEC)
-    if (cpu_mem_millis >= SHOW_CPU_LOAD_MSEC)
+  if (cpu_mem_millis >= SHOW_CPU_LOAD_MSEC)
+  {
+    if (peak1.available())
     {
-      if (peak1.available())
-      {
-         if (peak1.read() > 0.99)
-                peak++;
-      }
-      cpu_mem_millis -= SHOW_CPU_LOAD_MSEC;
-      show_cpu_and_mem_usage();
+      if (peak1.read() > 0.99)
+        peak++;
     }
+    cpu_mem_millis -= SHOW_CPU_LOAD_MSEC;
+    show_cpu_and_mem_usage();
+  }
 #endif
   //}
 }
@@ -547,7 +547,7 @@ void handleNoteOff(byte inChannel, byte inNumber, byte inVelocity)
 {
   if (checkMidiChannel(inChannel))
   {
-      MicroDexed[0]->keyup(inNumber);
+    MicroDexed[0]->keyup(inNumber);
   }
 }
 
@@ -1015,22 +1015,25 @@ void set_volume(uint8_t v, int8_t p, uint8_t m)
   // http://files.csound-tutorial.net/floss_manual/Release03/Cs_FM_03_ScrapBook/b-panning-and-spatialization.html
   volume_r.gain(tmp3 * sinf(tmp2 * PI / 2));
   volume_l.gain(tmp3 * cosf(tmp2 * PI / 2));
-  
+
   switch (m)
   {
-    case 0:
+    case 0: // stereo
       stereomono1.stereo(true);
       break;
-    case 1:
+    case 1: // mono both
       stereomono1.stereo(false);
+      configuration.pan = 0.5;
       break;
-    case 2:
+    case 2: // mono right
       volume_l.gain(0.0);
       stereomono1.stereo(false);
+      configuration.pan = 0.5;
       break;
-    case 3:
+    case 3: // mono left
       volume_r.gain(0.0);
       stereomono1.stereo(false);
+      configuration.pan = 0.5;
       break;
   }
 }
diff --git a/UI.hpp b/UI.hpp
index bc311ff..55849e5 100644
--- a/UI.hpp
+++ b/UI.hpp
@@ -1428,6 +1428,11 @@ void UI_func_panorama(uint8_t param)
     // setup function
     lcd.setCursor(0, 0);
     lcd.print(F("Panorama"));
+    if (configuration.mono > 0)
+    {
+      lcd.setCursor(0, 1);
+      lcd.print(F("MONO-disabled"));
+    }
   }
 
   if (LCDML.FUNC_loop())          // ****** LOOP *********
@@ -1436,24 +1441,28 @@ void UI_func_panorama(uint8_t param)
     {
       LCDML.FUNC_goBackToMenu();
     }
-    else if (LCDML.BT_checkDown())
+    else if (LCDML.BT_checkDown() && configuration.mono == 0)
     {
       if (configuration.pan < PANORAMA_MAX)
       {
         configuration.pan++;
       }
     }
-    else if (LCDML.BT_checkUp())
+    else if (LCDML.BT_checkUp() && configuration.mono == 0)
     {
       if (configuration.pan > PANORAMA_MIN)
       {
         configuration.pan--;
       }
     }
-    lcd.setCursor(0, 1);
-    lcd_display_int(configuration.pan, 2, false, true, true);
 
-    set_volume(configuration.vol, configuration.pan, configuration.mono);
+    if (configuration.mono == 0)
+    {
+      lcd.setCursor(0, 1);
+      lcd_display_int(configuration.pan, 2, false, true, true);
+
+      set_volume(configuration.vol, configuration.pan, configuration.mono);
+    }
   }
 
   if (LCDML.FUNC_close())     // ****** STABLE END *********
@@ -1496,13 +1505,13 @@ void UI_func_stereo_mono(uint8_t param)
     switch (configuration.mono)
     {
       case 0:
-        lcd.print(F("[MONO  ]"));
-        stereomono1.stereo(false);
-        break;
-      case 1:
         lcd.print(F("[STEREO]"));
         stereomono1.stereo(true);
         break;
+      case 1:
+        lcd.print(F("[MONO  ]"));
+        stereomono1.stereo(false);
+        break;
       case 2:
         lcd.print(F("[MONO-R]"));
         stereomono1.stereo(false);
diff --git a/config.h b/config.h
index d7b3fbb..270b2c4 100644
--- a/config.h
+++ b/config.h
@@ -265,7 +265,7 @@
 #else
 #define MONO_MIN 0
 #define MONO_MAX 3
-#define MONO_DEFAULT 1
+#define MONO_DEFAULT 0
 #endif
 
 #define VOLUME_MIN 0