diff --git a/src/app_task.cpp b/src/app_task.cpp
index 46e8a0a..210dbf0 100644
--- a/src/app_task.cpp
+++ b/src/app_task.cpp
@@ -40,6 +40,9 @@ void AppTask::update() {
 }
 
 void AppTask::process_midi_event(const MidiEvent& event) {
+    Serial.printf("[APP] MIDI IN: Type=%d Ch=%d Note=%d Vel=%d\n",
+                  event.type, event.channel, event.data1, event.data2);
+    
     uint8_t led_index = 0xFF;
     uint8_t midi_channel = event.channel;
     uint8_t midi_note = event.data1;