diff --git a/src/engine/engine.cpp b/src/engine/engine.cpp
index 431146f1a..2493d620d 100644
--- a/src/engine/engine.cpp
+++ b/src/engine/engine.cpp
@@ -2621,6 +2621,10 @@ bool DivEngine::switchMaster() {
   return true;
 }
 
+void DivEngine::setMidiCallback(std::function<bool(const TAMidiMessage&)> what) {
+  midiCallback=what;
+}
+
 void DivEngine::synchronized(const std::function<void()>& what) {
   BUSY_BEGIN;
   what();
diff --git a/src/engine/engine.h b/src/engine/engine.h
index 8e20dd418..1fe93f345 100644
--- a/src/engine/engine.h
+++ b/src/engine/engine.h
@@ -244,6 +244,8 @@ class DivEngine {
 
   size_t totalProcessed;
 
+  std::function<bool(const TAMidiMessage&)> midiCallback=[](const TAMidiMessage&) -> bool {return false;};
+
   DivSystem systemFromFile(unsigned char val);
   unsigned char systemToFile(DivSystem val);
   int dispatchCmd(DivCommand c);
@@ -635,6 +637,10 @@ class DivEngine {
     // switch master
     bool switchMaster();
 
+    // set MIDI input callback
+    // if the specified function returns true, note feedback will be inhibited.
+    void setMidiCallback(std::function<bool(const TAMidiMessage&)> what);
+
     // perform secure/sync operation
     void synchronized(const std::function<void()>& what);
 
diff --git a/src/engine/playback.cpp b/src/engine/playback.cpp
index 515ae8e6d..259209e4a 100644
--- a/src/engine/playback.cpp
+++ b/src/engine/playback.cpp
@@ -1541,21 +1541,23 @@ void DivEngine::nextBuf(float** in, float** out, int inChans, int outChans, unsi
   // process MIDI events (TODO: everything)
   if (output->midiIn) while (!output->midiIn->queue.empty()) {
     TAMidiMessage& msg=output->midiIn->queue.front();
-    int chan=msg.type&15;
-    switch (msg.type&0xf0) {
-      case TA_MIDI_NOTE_OFF: {
-        if (chan<0 || chan>=chans) break;
-        pendingNotes.push(DivNoteEvent(msg.type&15,-1,-1,-1,false));
-        break;
-      }
-      case TA_MIDI_NOTE_ON: {
-        if (chan<0 || chan>=chans) break;
-        pendingNotes.push(DivNoteEvent(msg.type&15,-1,(int)msg.data[0]-12,msg.data[1],true));
-        break;
-      }
-      case TA_MIDI_PROGRAM: {
-        // TODO: change instrument event thingy
-        break;
+    if (!midiCallback(msg)) {
+      int chan=msg.type&15;
+      switch (msg.type&0xf0) {
+        case TA_MIDI_NOTE_OFF: {
+          if (chan<0 || chan>=chans) break;
+          pendingNotes.push(DivNoteEvent(msg.type&15,-1,-1,-1,false));
+          break;
+        }
+        case TA_MIDI_NOTE_ON: {
+          if (chan<0 || chan>=chans) break;
+          pendingNotes.push(DivNoteEvent(msg.type&15,-1,(int)msg.data[0]-12,msg.data[1],true));
+          break;
+        }
+        case TA_MIDI_PROGRAM: {
+          // TODO: change instrument event thingy
+          break;
+        }
       }
     }
     logD("%.2x\n",msg.type);
diff --git a/src/gui/gui.cpp b/src/gui/gui.cpp
index 7cbf10970..870e7de1b 100644
--- a/src/gui/gui.cpp
+++ b/src/gui/gui.cpp
@@ -2628,6 +2628,11 @@ bool FurnaceGUI::init() {
 
   firstFrame=true;
 
+  // TODO
+  e->setMidiCallback([this](const TAMidiMessage& msg) -> bool {
+    return true;
+  });
+
   return true;
 }
 
@@ -2907,4 +2912,4 @@ FurnaceGUI::FurnaceGUI():
   memset(patChanX,0,sizeof(float)*(DIV_MAX_CHANS+1));
   memset(patChanSlideY,0,sizeof(float)*(DIV_MAX_CHANS+1));
   memset(lastIns,-1,sizeof(int)*DIV_MAX_CHANS);
-}
\ No newline at end of file
+}