diff --git a/MicroMDAEPiano.ino b/MicroMDAEPiano.ino
index 5dc7013..37fefa2 100644
--- a/MicroMDAEPiano.ino
+++ b/MicroMDAEPiano.ino
@@ -67,12 +67,16 @@ AudioConnection          patchCord6(queue_r, 0, mixer_r, 0);
 AudioConnection          patchCord7(queue_l, 0, mixer_l, 0);
 AudioConnection          patchCord8(freeverb_r, 0, mixer_r, 1);
 AudioConnection          patchCord9(freeverb_l, 0, mixer_l, 1);
-#ifdef TEENSY_AUDIO_BOARD
+#if defined(TEENSY_AUDIO_BOARD) || defined(TGA_AUDIO_BOARD)
 AudioOutputI2S           i2s1;
 AudioConnection          patchCord110(mixer_r, 0, i2s1, 0);
 AudioConnection          patchCord111(mixer_l, 0, i2s1, 1);
+#ifdef TEENSY_AUDIO_BOARD
 AudioControlSGTL5000     sgtl5000_1;
 #else
+AudioControlWM8731master wm8731m1;
+#endif
+#else
 AudioOutputPT8211        pt8211_1;
 AudioAmplifier           volume_r;
 AudioAmplifier           volume_l;
@@ -127,26 +131,26 @@ void setup()
   Serial.begin(SERIAL_SPEED);
   delay(220);
 
-/*
-  // LCD display setup
-  lcd.init();
-  lcd.blink_off();
-  lcd.cursor_off();
-  lcd.backlight();
-  lcd.noAutoscroll();
-  lcd.clear();
-  lcd.display();
-  lcd.show(0, 0, 20, " MicroMDAEPiano");
-  lcd.show(1, 0, 16, "(c)parasiTstudio");
-
-  // Encoder setup
-  enc[0].write(INITIAL_ENC_L_VALUE);
-  enc_val[0] = enc[0].read();
-  enc[1].write(INITIAL_ENC_R_VALUE);
-  enc_val[1] = enc[1].read();
-  but[0].update();
-  but[1].update();
-*/
+  /*
+    // LCD display setup
+    lcd.init();
+    lcd.blink_off();
+    lcd.cursor_off();
+    lcd.backlight();
+    lcd.noAutoscroll();
+    lcd.clear();
+    lcd.display();
+    lcd.show(0, 0, 20, " MicroMDAEPiano");
+    lcd.show(1, 0, 16, "(c)parasiTstudio");
+
+    // Encoder setup
+    enc[0].write(INITIAL_ENC_L_VALUE);
+    enc_val[0] = enc[0].read();
+    enc[1].write(INITIAL_ENC_R_VALUE);
+    enc_val[1] = enc[1].read();
+    but[0].update();
+    but[1].update();
+  */
 
   // Debug output
   Serial.println(F("MicroMDAEPiano based on https://sourceforge.net/projects/mda-vst"));
@@ -164,25 +168,35 @@ void setup()
   // read initial EEPROM variables
   initial_values_from_eeprom();
 
+#ifdef MIDI_DEVICE_DIN
+  // Start serial MIDI
+  midi_serial.begin(DEFAULT_MIDI_CHANNEL);
+  midi_serial.setHandleNoteOn(handleNoteOn_MIDI_DEVICE_DIN);
+  midi_serial.setHandleNoteOff(handleNoteOff_MIDI_DEVICE_DIN);
+  midi_serial.setHandleControlChange(handleControlChange_MIDI_DEVICE_DIN);
+  Serial.println(F("MIDI_DEVICE_DIN enabled"));
+#endif
+
   // start up USB host
 #ifdef MIDI_DEVICE_USB_HOST
   usb_host.begin();
+  midi_usb.setHandleNoteOn(handleNoteOn_MIDI_DEVICE_USB_HOST);
+  midi_usb.setHandleNoteOff(handleNoteOff_MIDI_DEVICE_USB_HOST);
+  midi_usb.setHandleControlChange(handleControlChange_MIDI_DEVICE_USB_HOST);
   Serial.println(F("MIDI_DEVICE_USB_HOST enabled."));
 #endif
 
   // check for onboard USB-MIDI
 #ifdef MIDI_DEVICE_USB
   midi_onboard_usb.begin();
+  midi_onboard_usb.setHandleNoteOn(handleNoteOn_MIDI_DEVICE_USB);
+  midi_onboard_usb.setHandleNoteOff(handleNoteOff_MIDI_DEVICE_USB);
+  midi_onboard_usb.setHandleControlChange(handleControlChange_MIDI_DEVICE_USB);
   Serial.println(F("MIDI_DEVICE_USB enabled."));
 #endif
 
-#ifdef MIDI_DEVICE_DIN
-  // Start serial MIDI
-  midi_serial.begin(DEFAULT_MIDI_CHANNEL);
-  Serial.println(F("MIDI_DEVICE_DIN enabled"));
-#endif
-
   // start audio card
+  AudioNoInterrupts();
   AudioMemory(AUDIO_MEM);
 
 #ifdef TEENSY_AUDIO_BOARD
@@ -195,6 +209,11 @@ void setup()
   sgtl5000_1.volume(1.0, 1.0);
 #endif
 
+#ifdef TGA_AUDIO_BOARD
+  wm8731m1.enable();
+  wm8731m1.volume(1.0);
+#endif
+
   //set_volume(vol, vol_left, vol_right);
   set_volume(1.0, 1.0, 1.0);
 
@@ -228,6 +247,7 @@ void setup()
   mixer_r.gain(1, 0.3);
   mixer_l.gain(1, 0.3);
 
+  AudioNoInterrupts();
   Serial.println(F("<setup end>"));
 
 #if defined (DEBUG) && defined (SHOW_CPU_LOAD_MSEC)
@@ -236,7 +256,6 @@ void setup()
 #endif
 }
 
-
 //*************************************************************************************************
 //* MAIN LOOP
 //*************************************************************************************************
@@ -300,78 +319,186 @@ void loop()
     queue_r.playBuffer();
     queue_l.playBuffer();
   }
-
-  handle_input();
+#ifdef MIDI_DEVICE_DIN
+  midi_serial.read();
+#endif
+#ifdef MIDI_DEVICE_USB_HOST
+  midi_usb.read();
+#endif
+#ifdef MIDI_DEVICE_USB
+  midi_onboard_usb.read();
+#endif
 }
 
-
 //*************************************************************************************************
 //* PROGRAM FUNCTIONS
 //*************************************************************************************************
+#ifdef MIDI_DEVICE_DIN
+void handleNoteOn_MIDI_DEVICE_DIN(byte inChannel, byte inNumber, byte inVelocity)
+{
+  handleNoteOn(byte inChannel, byte inNumber, byte inVelocity);
+#ifdef MIDI_MERGE_THRU
+#ifdef MIDI_DEVICE_USB_HOST
+  midi_usb.send(midi::NoteOn, inNumber, inVelocity, inChannel);
+#endif
+#ifdef MIDI_DEVICE_USB
+  midi_onboard_usb.send(midi::NoteOn, inNumber, inVelocity, inChannel);
+#endif
+#endif
+}
 
-void handle_input(void)
+void handleNoteOff_MIDI_DEVICE_DIN(byte inChannel, byte inNumber, byte inVelocity)
 {
-#ifdef MIDI_DEVICE_DIN
-  while (midi_serial.read())
-  {
-#ifdef DEBUG
-    Serial.println(F("[MIDI-Serial]"));
+  handleNoteOff(byte inChannel, byte inNumber, byte inVelocity)
+#ifdef MIDI_MERGE_THRU
+#ifdef MIDI_DEVICE_USB_HOST
+  midi_usb.send(midi::NoteOff, inNumber, inVelocity, inChannel);
+#endif
+#ifdef MIDI_DEVICE_USB
+  midi_onboard_usb.send(midi::NoteOff, inNumber, inVelocity, inChannel);
 #endif
-    queue_midi_event(midi_serial.getType(), midi_serial.getData1(), midi_serial.getData2());
-  }
 #endif
+}
+
+void handleControlChange_MIDI_DEVICE_DIN(byte inChannel, byte inData1, byte inData2)
+{
+  handleControlChange(byte inChannel, byte inData1, byte inData2)
+#ifdef MIDI_MERGE_THRU
 #ifdef MIDI_DEVICE_USB_HOST
-  usb_host.Task();
-  while (midi_usb.read())
-  {
-#ifdef DEBUG
-    Serial.println(F("[MIDI-USB-HOST]"));
+  midi_usb.send(midi::ControlChange, inData1, inData2, inChannel);
 #endif
-    queue_midi_event(midi_usb.getType(), midi_usb.getData1(), midi_usb.getData2());
-  }
+#ifdef MIDI_DEVICE_USB
+  midi_onboard_usb.send(midi::ControlChange, inData1, inData2, inChannel);
+#endif
+#endif
+}
+#endif
+
+#ifdef MIDI_DEVICE_USB_HOST
+void handleNoteOn_MIDI_DEVICE_USB_HOST(byte inChannel, byte inNumber, byte inVelocity)
+{
+  handleNoteOn(inChannel, inNumber, inVelocity);
+#ifdef MIDI_MERGE_THRU
+#ifdef MIDI_DEVICE_DIN
+  midi_serial.send(midi::NoteOn, inNumber, inVelocity, inChannel);
 #endif
 #ifdef MIDI_DEVICE_USB
-  while (midi_onboard_usb.read())
-  {
-#ifdef DEBUG
-    Serial.println(F("[MIDI-USB]"));
+  midi_onboard_usb.send(midi::NoteOn, inNumber, inVelocity, inChannel);
 #endif
-    queue_midi_event(midi_onboard_usb.getType(), midi_onboard_usb.getData1(), midi_onboard_usb.getData2());
-  }
 #endif
 }
 
-bool queue_midi_event(uint8_t type, uint8_t data1, uint8_t data2)
+void handleNoteOff_MIDI_DEVICE_USB_HOST(byte inChannel, byte inNumber, byte inVelocity)
+{
+  handleNoteOff(inChannel, inNumber, inVelocity);
+#ifdef MIDI_MERGE_THRU
+#ifdef MIDI_DEVICE_DIN
+  midi_serial.send(midi::NoteOff, inNumber, inVelocity, inChannel);
+#endif
+#ifdef MIDI_DEVICE_USB
+  midi_onboard_usb.send(midi::NoteOff, inNumber, inVelocity, inChannel);
+#endif
+#endif
+}
+
+void handleControlChange_MIDI_DEVICE_USB_HOST(byte inChannel, byte inData1, byte inData2)
 {
-  bool ret = false;
+  handleControlChange(inChannel, inData1, inData2);
+#ifdef MIDI_MERGE_THRU
+#ifdef MIDI_DEVICE_DIN
+  midi_serial.send(midi::ControlChange, inData1, inData2, inChannel);
+#endif
+#ifdef MIDI_DEVICE_USB
+  midi_onboard_usb.send(midi::ControlChange, inData1, inData2, inChannel);
+#endif
+#endif
+}
+#endif
 
-#if defined(DEBUG) && defined(SHOW_MIDI_EVENT)
-  print_midi_event(type, data1, data2);
+#ifdef MIDI_DEVICE_USB
+void handleNoteOn_MIDI_DEVICE_USB(byte inChannel, byte inNumber, byte inVelocity)
+{
+  handleNoteOn(inChannel, inNumber, inVelocity);
+#ifdef MIDI_MERGE_THRU
+#ifdef MIDI_DEVICE_DIN
+  midi_serial.send(midi::NoteOn, inNumber, inVelocity, inChannel);
+#endif
+#ifdef MIDI_DEVICE_USB_HOST
+  midi_usb.send(midi::NoteOn, inNumber, inVelocity, inChannel);
+#endif
 #endif
+}
 
-  // check for MIDI channel
-  if (midi_channel != MIDI_CHANNEL_OMNI)
-  {
-    uint8_t c = type & 0x0f;
-    if (c != midi_channel)
-    {
-#ifdef DEBUG
-      Serial.print(F("Ignoring MIDI data on channel "));
-      Serial.print(c);
-      Serial.print(F("(listening on "));
-      Serial.print(midi_channel);
-      Serial.println(F(")"));
+void handleNoteOff_MIDI_DEVICE_USB(byte inChannel, byte inNumber, byte inVelocity)
+{
+  handleNoteOff(inChannel, inNumber, inVelocity);
+#ifdef MIDI_MERGE_THRU
+#ifdef MIDI_DEVICE_DIN
+  midi_serial.send(midi::NoteOff, inNumber, inVelocity, inChannel);
 #endif
-      return (false);
-    }
+#ifdef MIDI_DEVICE_USB_HOST
+  midi_usb.send(midi::NoteOff, inNumber, inVelocity, inChannel);
+#endif
+#endif
+}
+
+void handleControlChange_MIDI_DEVICE_USB(byte inChannel, byte inData1, byte inData2)
+{
+  handleControlChange(inChannel, inData1, inData2);
+#ifdef MIDI_MERGE_THRU
+#ifdef MIDI_DEVICE_DIN
+  midi_serial.send(midi::ControlChange, inData1, inData2, inChannel);
+#endif
+#ifdef MIDI_DEVICE_USB_HOST
+  midi_usb.send(midi::ControlChange, inData1, inData2, inChannel);
+#endif
+#endif
+}
+#endif
+
+void handleNoteOn(byte inChannel, byte inNumber, byte inVelocity)
+{
+  if (checkMidiChannel(inChannel))
+  {
+    ep->noteOn(inNumber, inVelocity);
   }
+}
 
-  // now throw away the MIDI channel information
-  type &= 0xf0;
+void handleNoteOff(byte inChannel, byte inNumber, byte inVelocity)
+{
+  if (checkMidiChannel(inChannel))
+  {
+    ep->noteOn(inNumber, 0);
+  }
+}
 
-  ret = ep->processMidiMessage(type, data1, data2);
+void handleControlChange(byte inChannel, byte inData1, byte inData2)
+{
+  if (checkMidiChannel(inChannel))
+  {
+    ep->processMidiController(inData1, inData2);
+  }
+}
 
-  return (ret);
+bool checkMidiChannel(byte inChannel)
+{
+  // check for MIDI channel
+  if (inChannel == MIDI_CHANNEL_OMNI)
+  {
+    return (true);
+  }
+  else if (inChannel != midi_channel)
+  {
+#ifdef DEBUG
+    Serial.print(F("Ignoring MIDI data on channel "));
+    Serial.print(inChannel);
+    Serial.print(F("(listening on "));
+    Serial.print(midi_channel);
+    Serial.println(F(")"));
+#endif
+    return (false);
+  }
+  return (true);
 }
 
 void set_volume(float v, float vr, float vl)
@@ -413,13 +540,14 @@ void set_volume(float v, float vr, float vl)
 
 #ifdef TEENSY_AUDIO_BOARD
   sgtl5000_1.dacVolume(vol * vol_left, vol * vol_right);
+#elif TGA_AUDIO_BOARD
+  wm8731m1.volume(vol);
 #else
   volume_r.gain(vr);
   volume_l.gain(vl);
 #endif
 }
 
-
 //*************************************************************************************************
 //* EEPROM FUNCTIONS
 //*************************************************************************************************
@@ -503,27 +631,6 @@ uint32_t eeprom_crc32(uint16_t calc_start, uint16_t calc_bytes) // base code fro
 //* DEBUG FUNCTIONS
 //*************************************************************************************************
 
-#ifdef DEBUG
-#ifdef SHOW_MIDI_EVENT
-void print_midi_event(uint8_t type, uint8_t data1, uint8_t data2)
-{
-  Serial.print(F("MIDI-Channel: "));
-  if (midi_channel == MIDI_CHANNEL_OMNI)
-    Serial.print(F("OMNI"));
-  else
-    Serial.print(midi_channel, DEC);
-  Serial.print(F(", MIDI event type: 0x"));
-  if (type < 16)
-    Serial.print(F("0"));
-  Serial.print(type, HEX);
-  Serial.print(F(", data1: "));
-  Serial.print(data1, DEC);
-  Serial.print(F(", data2: "));
-  Serial.println(data2, DEC);
-}
-#endif
-#endif
-
 #if defined (DEBUG) && defined (SHOW_CPU_LOAD_MSEC)
 void show_cpu_and_mem_usage(void)
 {
diff --git a/config.h b/config.h
index 3519c03..d286b78 100644
--- a/config.h
+++ b/config.h
@@ -40,6 +40,7 @@
 
 // AUDIO
 //#define TEENSY_AUDIO_BOARD 1
+#define TGA_AUDIO_BOARD 1
 
 //*************************************************************************************************
 //* MIDI SETTINGS
diff --git a/mdaEPiano.cpp b/mdaEPiano.cpp
index 6dd1538..7fe3abf 100644
--- a/mdaEPiano.cpp
+++ b/mdaEPiano.cpp
@@ -228,9 +228,9 @@ void mdaEPiano::process(int16_t* outputs_r, int16_t* outputs_l)
     l += l * lmod * lfo1;
     r += r * rmod * lfo1;  //worth making all these local variables?
 
-    r*=0.5;
-    l*=0.5;
-    
+    r *= 0.5;
+    l *= 0.5;
+
     if (r > 1.0)
       r = 1.0;
     else if (r < -1.0)
@@ -328,63 +328,42 @@ void mdaEPiano::noteOn(int32_t note, int32_t velocity)
   }
 }
 
-bool mdaEPiano::processMidiMessage(uint8_t type, uint8_t data1, uint8_t data2)
+bool mdaEPiano::processMidiController(uint8_t data1, uint8_t data2)
 {
   float* param = programs[curProgram].param;
 
-  switch (type)
+  switch (data1)
   {
-    case 0x80: //note off
-      noteOn(data1 & 0x7F, 0);
+    case 0x01:  //mod wheel
+      modwhl = 0.0078f * (float)(data2);
+      if (modwhl > 0.05f) //over-ride pan/trem depth
+      {
+        rmod = lmod = modwhl; //lfo depth
+        if (param[4] < 0.5f) rmod = -rmod;
+      }
       break;
 
-    case 0x90: //note on
-      noteOn(data1 & 0x7F, data2 & 0x7F);
+    case 0x07:  //volume
+      volume = 0.00002f * (float)(data2 * data2);
       break;
 
-    case 0xB0: //controller
-      switch (data1)
+    case 0x40:  //sustain pedal
+    case 0x42:  //sustenuto pedal
+      sustain = data2 & 0x40;
+      if (sustain == 0)
       {
-        case 0x01:  //mod wheel
-          modwhl = 0.0078f * (float)(data2);
-          if (modwhl > 0.05f) //over-ride pan/trem depth
-          {
-            rmod = lmod = modwhl; //lfo depth
-            if (param[4] < 0.5f) rmod = -rmod;
-          }
-          break;
-
-
-        case 0x07:  //volume
-          volume = 0.00002f * (float)(data2 * data2);
-          break;
-
-        case 0x40:  //sustain pedal
-        case 0x42:  //sustenuto pedal
-          sustain = data2 & 0x40;
-          if (sustain == 0)
-          {
-            noteOn(SUSTAIN, 0); //end all sustained notes
-          }
-          break;
-
-        default:  //all notes off
-          if (data1 > 0x7A)
-          {
-            for (int32_t v = 0; v < NVOICES; v++) voice[v].dec = 0.99f;
-            sustain = 0;
-            muff = 160.0f;
-          }
-          break;
+        noteOn(SUSTAIN, 0); //end all sustained notes
       }
       break;
 
-    case 0xC0: //program change
-      if (data1 < NPROGS) setProgram(data1);
+    default:  //all notes off
+      if (data1 > 0x7A)
+      {
+        for (int32_t v = 0; v < NVOICES; v++) voice[v].dec = 0.99f;
+        sustain = 0;
+        muff = 160.0f;
+      }
       break;
-
-    default: break;
   }
-
   return (true);
 }
diff --git a/mdaEPiano.h b/mdaEPiano.h
index 26c51cf..4ea5584 100644
--- a/mdaEPiano.h
+++ b/mdaEPiano.h
@@ -79,7 +79,8 @@ class mdaEPiano
     ~mdaEPiano();
 
     virtual void process(int16_t *outputs_r, int16_t *outputs_l);
-    virtual bool processMidiMessage(uint8_t type, uint8_t data1, uint8_t data2);
+    void noteOn(int32_t note, int32_t velocity);
+    virtual bool processMidiController(uint8_t data1, uint8_t data2);
     virtual void setProgram(int32_t program);
     virtual void setParameter(int32_t index, float value);
     virtual float getParameter(int32_t index);
@@ -90,10 +91,9 @@ class mdaEPiano
 
   private:
     void update();  //my parameter update
-    void noteOn(int32_t note, int32_t velocity);
     void fillpatch(int32_t p, char *name, float p0, float p1, float p2, float p3, float p4,
                    float p5, float p6, float p7, float p8, float p9, float p10, float p11);
-                   
+
     mdaEPianoProgram* programs;
     float Fs, iFs;