diff --git a/UI.hpp b/UI.hpp
index 6aa350c..cf9a4b3 100644
--- a/UI.hpp
+++ b/UI.hpp
@@ -1645,7 +1645,7 @@ void UI_func_tune(uint8_t param)
       }
 
       MicroDexed[instance_id]->data[DEXED_GLOBAL_PARAMETER_OFFSET + DEXED_MASTER_TUNE] = configuration.dexed[instance_id].tune;
-      MicroDexed[instance_id]->controllers.masterTune = (MicroDexed[instance_id]->data[DEXED_GLOBAL_PARAMETER_OFFSET + DEXED_MASTER_TUNE] * 0x4000 << 11) * (1.0 / 12);
+      MicroDexed[instance_id]->controllers.masterTune = (MicroDexed[instance_id]->data[DEXED_GLOBAL_PARAMETER_OFFSET + DEXED_MASTER_TUNE] / 10 * 0x4000 << 11) * (1.0 / 12);
       MicroDexed[instance_id]->doRefreshVoice();
     }
 
@@ -2025,7 +2025,7 @@ void UI_func_mono_poly(uint8_t param)
         }
       }
 
-      MicroDexed[instance_id]->setMonoMode(configuration.dexed[instance_id].monopoly);
+      MicroDexed[instance_id]->setMonoMode(!configuration.dexed[instance_id].monopoly);
     }
 
     lcd.setCursor(0, 1);
diff --git a/config.h b/config.h
index 4de4cdd..c0308be 100644
--- a/config.h
+++ b/config.h
@@ -212,6 +212,7 @@
 //* DO NO CHANGE ANYTHING BEYOND IF YOU DON'T KNOW WHAT YOU ARE DOING !!!
 //*************************************************************************************************
 #define NUM_DEXED 1
+#define NORMALIZE_DX_VELOCITY 1
 
 enum { DEXED, REVERB, DELAY, CHORUS };
 
diff --git a/dexed.cpp b/dexed.cpp
index 2f837d7..23f025e 100644
--- a/dexed.cpp
+++ b/dexed.cpp
@@ -191,6 +191,10 @@ void Dexed::keydown(uint8_t pitch, uint8_t velo) {
 
   pitch += data[144] - TRANSPOSE_FIX;
 
+#if defined(NORMALIZE_DX_VELOCITY)
+  velo = ((float)velo) * 0.7874015; // 100/127
+#endif
+
   int previousKeyDown = lastKeyDown;
   lastKeyDown = pitch;
 
@@ -221,6 +225,7 @@ void Dexed::keydown(uint8_t pitch, uint8_t velo) {
 
   if (keydown_counter == 0)
     lfo.keydown();
+
   if ( monoMode ) {
     for (uint8_t i = 0; i < max_notes; i++) {
       if ( voices[i].live ) {