diff --git a/UI.hpp b/UI.hpp
index 3492819..d403d43 100644
--- a/UI.hpp
+++ b/UI.hpp
@@ -3970,9 +3970,10 @@ void UI_func_voice_select(uint8_t param)
 
     lcd.show(0, 0, 2, configuration.performance.bank[selected_instance_id]);
     lcd.show(1, 0, 2, configuration.performance.voice[selected_instance_id] + 1);
+    string_toupper(bank_name);
     lcd.show(0, 3, 8, bank_name);
+    string_toupper(voice_name);
     lcd.show(1, 3, 10, voice_name);
-    //lcd.show(0, 3, 10, bank_name);
 
     switch (menu_voice_select)
     {
diff --git a/config.h b/config.h
index 1d9ac22..cca430a 100644
--- a/config.h
+++ b/config.h
@@ -129,9 +129,9 @@
 //*************************************************************************************************
 #define SAMPLE_RATE 44100
 #if AUDIO_BLOCK_SAMPLES == 64
-#define AUDIO_MEM 64
+#define AUDIO_MEM 256
 #else
-#define AUDIO_MEM 32
+#define AUDIO_MEM 128
 #endif
 
 #ifdef TEENSY_AUDIO_BOARD
diff --git a/dexed.cpp b/dexed.cpp
index d077919..bf7263b 100644
--- a/dexed.cpp
+++ b/dexed.cpp
@@ -317,14 +317,16 @@ void Dexed::keyup(int16_t pitch) {
     if ( voices[note].midi_note == pitch && voices[note].keydown ) {
       voices[note].keydown = false;
       voices[note].key_pressed_timer = 0;
-#ifdef DEBUG
-      Serial.print(F("Stop voice: "));
-      Serial.print(note, DEC);
-      Serial.print(F(" pitch: "));
-      Serial.println(pitch, DEC);
-      Serial.print(F(" id: "));
-      Serial.println(id, DEC);
-#endif
+      /*
+        #ifdef DEBUG
+        Serial.print(F("Stop voice: "));
+        Serial.print(note, DEC);
+        Serial.print(F(" pitch: "));
+        Serial.println(pitch, DEC);
+        Serial.print(F(" id: "));
+        Serial.println(id, DEC);
+        #endif
+      */
       break;
     }
   }
@@ -492,7 +494,7 @@ uint8_t Dexed::getNumNotesPlaying(void)
   uint8_t i;
   uint8_t count_playing_voices = 0;
   VoiceStatus voiceStatus;
-  
+
   for (i = 0; i < max_notes; i++)
   {
     if (voices[i].live == true)
@@ -502,29 +504,29 @@ uint8_t Dexed::getNumNotesPlaying(void)
 
       memset(&voiceStatus, 0, sizeof(VoiceStatus));
       voices[i].dx7_note->peekVoiceStatus(voiceStatus);
-
-#ifdef DEBUG
-      Serial.println(i);
-      Serial.print("ALG: ");
-      Serial.println(data[134]+1);
-#endif
-
+      /*
+        #ifdef DEBUG
+            Serial.println(i);
+            Serial.print("ALG: ");
+            Serial.println(data[134]+1);
+        #endif
+      */
       for (uint8_t op = 0; op < 6; op++)
       {
         if ((op_carrier & (1 << op)))
         {
           // this voice is a carrier!
           op_carrier_num++;
-
-#ifdef DEBUG
-          Serial.print("OP: ");
-          Serial.print(op);
-          Serial.print(" AMP_STEP: ");
-          Serial.print(voiceStatus.ampStep[op],DEC);
-          Serial.print(" AMP: ");
-          Serial.println(voiceStatus.amp[op],DEC);
-#endif
-
+          /*
+            #ifdef DEBUG
+                    Serial.print("OP: ");
+                    Serial.print(op);
+                    Serial.print(" AMP_STEP: ");
+                    Serial.print(voiceStatus.ampStep[op],DEC);
+                    Serial.print(" AMP: ");
+                    Serial.println(voiceStatus.amp[op],DEC);
+            #endif
+          */
           if (voiceStatus.amp[op] < VOICE_SILENCE_LEVEL && voiceStatus.ampStep[op] >= 3)
           {
             // this voice produces no audio output
@@ -542,13 +544,14 @@ uint8_t Dexed::getNumNotesPlaying(void)
             Serial.println(op_amp, DEC);
       */
 
-#ifdef DEBUG
-          Serial.print("OP_AMP: ");
-          Serial.print(op_amp);
-          Serial.print(" OP_CARRIER_NUM: ");
-          Serial.println(op_carrier_num);
-#endif
-
+      /*
+        #ifdef DEBUG
+            Serial.print("OP_AMP: ");
+            Serial.print(op_amp);
+            Serial.print(" OP_CARRIER_NUM: ");
+            Serial.println(op_carrier_num);
+        #endif
+      */
       if (op_amp == op_carrier_num)
       {
         // all carrier-operators are silent -> disable the voice
diff --git a/dexed_sd.cpp b/dexed_sd.cpp
index 9a15586..b8586e5 100644
--- a/dexed_sd.cpp
+++ b/dexed_sd.cpp
@@ -50,7 +50,7 @@ bool load_sd_voice(uint8_t b, uint8_t v, uint8_t instance_id)
 
     get_bank_name(b, bank_name, sizeof(bank_name));
     sprintf(filename, "/%d/%s.syx", b, bank_name);
-
+    
     sysex = SD.open(filename);
     if (!sysex)
     {
@@ -833,7 +833,7 @@ uint8_t calc_checksum(uint8_t* data, uint16_t len)
   return (bulk_checksum_calc & 0x7f);
 }
 
-void strip_extension(char* s, char* target, uint8_t len)
+void strip_extension(const char* s, char* target, uint8_t len)
 {
   char tmp[FILENAME_LEN];
   char* token;
@@ -987,3 +987,12 @@ bool get_voice_by_bank_name(uint8_t b, const char* bank_name, uint8_t v, char* v
 
   return (false);
 }
+
+void string_toupper(char* s)
+{
+  while (*s)
+  {
+    *s = toupper((unsigned char) * s);
+    s++;
+  }
+}
diff --git a/dexed_sd.h b/dexed_sd.h
index d783295..52fe9af 100644
--- a/dexed_sd.h
+++ b/dexed_sd.h
@@ -67,9 +67,11 @@ bool save_sd_performance(uint8_t p);
 bool get_sd_data(File sysex, uint8_t format, uint8_t* conf);
 bool write_sd_data(File sysex, uint8_t format, uint8_t* data, uint16_t len);
 uint8_t calc_checksum(uint8_t* data, uint16_t len);
-void strip_extension(char* s, char* target);
+void strip_extension(const char* s, char* target);
 
 bool get_bank_name(uint8_t b, char* name, uint8_t len);
 bool get_voice_name(uint8_t b, uint8_t v, char* name, uint8_t len);
 bool get_voice_by_bank_name(uint8_t b, const char* bank_name, uint8_t v, char* voice_name, uint8_t len);
+
+void string_toupper(char* s);
 #endif