diff --git a/MicroDexed.ino b/MicroDexed.ino
index 0e9053f..48209c7 100644
--- a/MicroDexed.ino
+++ b/MicroDexed.ino
@@ -1973,7 +1973,6 @@ void check_configuration_drums(void) {
   configuration.drums.midi_channel = constrain(configuration.drums.midi_channel, DRUMS_MIDI_CHANNEL_MIN, DRUMS_MIDI_CHANNEL_MAX);
 
   for (uint8_t i = 0; i < NUM_DRUMSET_CONFIG - 1; i++) {
-    Serial.printf("CHK m=%d\n", drum_config[i].midinote);
     drum_config[i].midinote = constrain(drum_config[i].midinote, DRUMS_MIDI_NOTE_MIN, DRUMS_MIDI_NOTE_MAX);
     drum_config[i].pitch = constrain(drum_config[i].pitch, DRUMS_PITCH_MIN, DRUMS_PITCH_MAX);
     drum_config[i].pan = constrain(drum_config[i].pan, DRUMS_PANORAMA_MIN, DRUMS_PANORAMA_MAX);
@@ -2344,7 +2343,7 @@ int8_t handle_midi_learn(int8_t note) {
   int8_t ret_channel = -1;
 
 #ifdef DEBUG
-  Serial.print("MIDI learning for ");
+  Serial.print(F("MIDI learning for "));
   Serial.println(note);
 #endif
 
@@ -2358,9 +2357,9 @@ int8_t handle_midi_learn(int8_t note) {
       configuration.epiano.lowest_note = note;
     ret_channel = configuration.epiano.midi_channel;
 #ifdef DEBUG
-    Serial.print("MIDI learned lowest note: ");
+    Serial.print(F("MIDI learned lowest note: "));
     Serial.print(note);
-    Serial.print(" for EPiano, ghosting MIDI channel ");
+    Serial.print(F(" for EPiano, ghosting MIDI channel "));
     Serial.println(ret_channel);
 #endif
   } else if (LCDML.FUNC_getID() == LCDML.OTHER_getIDFromFunction(UI_func_epiano_highest_note)) {
@@ -2370,9 +2369,9 @@ int8_t handle_midi_learn(int8_t note) {
       configuration.epiano.highest_note = note;
     ret_channel = configuration.epiano.midi_channel;
 #ifdef DEBUG
-    Serial.print("MIDI learned highest note: ");
+    Serial.print(F("MIDI learned highest note: "));
     Serial.print(note);
-    Serial.print(" for EPiano, ghosting MIDI channel ");
+    Serial.print(F(" for EPiano, ghosting MIDI channel "));
     Serial.println(ret_channel);
 #endif
   }
@@ -2386,11 +2385,11 @@ int8_t handle_midi_learn(int8_t note) {
         configuration.dexed[selected_instance_id].lowest_note = note;
       ret_channel = configuration.dexed[selected_instance_id].midi_channel;
 #ifdef DEBUG
-      Serial.print("MIDI learned lowest note: ");
+      Serial.print(F("MIDI learned lowest note: "));
       Serial.print(note);
-      Serial.print(" for instance: ");
+      Serial.print(F(" for instance: "));
       Serial.print(selected_instance_id);
-      Serial.print(", ghosting MIDI channel ");
+      Serial.print(F(", ghosting MIDI channel "));
       Serial.println(ret_channel);
 #endif
     } else if (LCDML.FUNC_getID() == LCDML.OTHER_getIDFromFunction(UI_func_highest_note)) {
@@ -2400,11 +2399,11 @@ int8_t handle_midi_learn(int8_t note) {
         configuration.dexed[selected_instance_id].highest_note = note;
       ret_channel = configuration.dexed[selected_instance_id].midi_channel;
 #ifdef DEBUG
-      Serial.print("MIDI learned highest note: ");
+      Serial.print(F("MIDI learned highest note: "));
       Serial.print(note);
-      Serial.print(" for instance: ");
+      Serial.print(F(" for instance: "));
       Serial.print(selected_instance_id);
-      Serial.print(", ghosting MIDI channel ");
+      Serial.print(F(", ghosting MIDI channel "));
       Serial.println(ret_channel);
 #endif
     }