diff --git a/docs/roadmap.txt b/docs/roadmap.txt
index 6b12098..894c32c 100644
--- a/docs/roadmap.txt
+++ b/docs/roadmap.txt
@@ -49,5 +49,5 @@ v 0.2.1
 - SettingsDialog.
 - Load/save conf file.
 - ¿Exit Point? is it needed?
-- Hardening: check return errors, i'm too happy....
+- Hardening: check return errors, catch execptions, i'm too happy....
 - Tests: errors on wrong conf file.
diff --git a/libremediaserver-audio.pro b/libremediaserver-audio.pro
index 42ef0d1..41d6ecd 100644
--- a/libremediaserver-audio.pro
+++ b/libremediaserver-audio.pro
@@ -30,9 +30,9 @@ SOURCES += src/main.cpp \
     src/settings.cpp \
     src/slidergroup.cpp
 FORMS += src/libremediaserver-audio-gui.ui
-CCFLAG += -msse2 -mavx2 #-fsanitize=address -g -O0
+CCFLAG += -msse2 -mavx2 #-fsanitize=address -g3 -O0
 QMAKE_CXXFLAGS += $$(CXXFLAG)
-#QMAKE_CXXFLAGS += -fsanitize=address -g -O0
+#QMAKE_CXXFLAGS += -fsanitize=address -g3 -O0
 QMAKE_CFLAGS += $$(CCFLAG)
 QMAKE_LFLAGS += $$(LDFLAG)
 LIBS += -lola -lolacommon -ldl -lpthread -lm
diff --git a/src/clickablelabel.cpp b/src/clickablelabel.cpp
index 333219b..623493d 100644
--- a/src/clickablelabel.cpp
+++ b/src/clickablelabel.cpp
@@ -3,11 +3,12 @@
 ClickableLabel::ClickableLabel(QWidget *parent, Qt::WindowFlags f)
     : QLabel{parent}
 {
-
+    Q_UNUSED(f);
 }
 
 ClickableLabel::~ClickableLabel() {}
 
 void ClickableLabel::mousePressEvent(QMouseEvent* event) {
+    Q_UNUSED(event);
     emit clicked();
 }
diff --git a/src/defines.h b/src/defines.h
index 633b06c..a4eeea5 100644
--- a/src/defines.h
+++ b/src/defines.h
@@ -6,7 +6,7 @@
 #define LICENSE "GPL 3 Licensed. See LICENSE.txt."
 #define DEFAULT_FILE "lms-audio.xlm"
 #define MAX_LAYERS 4
-#define UI_REFRESH_TIME 1000
+#define UI_REFRESH_TIME 200
 
 // struct where save the DMX settings for each layer
 struct dmxSetting {
diff --git a/src/libremediaserver-audio.cpp b/src/libremediaserver-audio.cpp
index b59a8f1..d146e10 100644
--- a/src/libremediaserver-audio.cpp
+++ b/src/libremediaserver-audio.cpp
@@ -28,6 +28,12 @@ libreMediaServerAudio::libreMediaServerAudio(bool gui)
     set->readFile();
     m_mediaLibrary = new MediaLibrary;
     m_mediaLibrary->initMediaLibrary();
+    for (int i = 0; i < MAX_LAYERS; i++) {
+        m_currentMedia[i] = Status::Iddle;
+        m_updateUi[i][0] = -1;
+        m_updateUi[i][1] = -1;
+        m_updateUi[i][2] = -1;
+    }
     m_ola = new olaThread(this, set->getLayersNumber());
     Q_CHECK_PTR(m_ola);
     m_ola->blockSignals(true);
@@ -54,7 +60,7 @@ libreMediaServerAudio::~libreMediaServerAudio()
 
 void libreMediaServerAudio::dmxInput(int layer, int channel, int value)
 {
-    if (layer > LAYER_CHANNELS)
+    if (layer >= MAX_LAYERS || channel >= LAYER_CHANNELS)
         return;
     QString mediaFile = NULL;
     int aux;
@@ -66,40 +72,32 @@ void libreMediaServerAudio::dmxInput(int layer, int channel, int value)
             return;
         if (QFile::exists(mediaFile)){
             m_mae.loadMedia(layer, mediaFile.toLatin1().data());
-#ifndef NOGUI
+            m_currentMedia[layer] = mediaFile;
+#ifndef NOGIO
             if (m_ui)
                 m_lmsUi->m_aw->mediaLoaded(layer, mediaFile, m_mae.getDuration(layer));
 #endif
-            m_currentMedia[layer] = mediaFile;
         }
+        return;
     } else if (channel == VOLUME_COARSE || channel == VOLUME_FINE) {
-        m_mae.volChanged(layer, (value / 65025.0f));
-#ifndef NOGUI
-        if (m_ui)
-            m_lmsUi->m_aw->volChanged(layer, (value / 650.25f));
-#endif
+        float tmp = value / 65025.0f;
+        m_mae.volChanged(layer, tmp);
+        m_updateUi[layer][0] = tmp * 100;
     } else if (channel == PAN) {
         m_mae.panChanged(layer, value);
-#ifndef NOGUI
-        if (m_ui)
-            m_lmsUi->m_aw->panChanged(layer, value);
-#endif
+        m_updateUi[layer][1] = value;
     } else if (channel == PITCH) {
         m_mae.pitchChanged(layer, value);
-#ifndef NOGUI
-        if (m_ui)
-            m_lmsUi->m_aw->pitchChanged(layer, value);
-#endif
+        m_updateUi[layer][2] = value;
     } else if (channel == ENTRY_POINT_COARSE || channel == ENTRY_POINT_FINE) {
         m_mae.setCursor(layer, value);
 #ifndef NOGUI
-        if (m_ui)
-            m_lmsUi->m_aw->cursorChanged(layer, m_mae.getCursor(layer));
+        m_lmsUi->m_aw->cursorChanged(layer, m_mae.getCursor(layer));
 #endif
-
+        return;
     } else if (channel == PLAYBACK && value > 0) {
-        Status s = m_mae.getStatus(layer);
         aux = value / 25;
+        Status s = m_currentStatus[layer];
         if (s != aux) {
             if (aux == 0)
                 s = Status::PlayingOnce;
@@ -110,9 +108,9 @@ void libreMediaServerAudio::dmxInput(int layer, int channel, int value)
             else if (aux == 3)
                 s = Status::PlayingLoop;
             m_mae.playbackChanged(layer, s);
+            m_currentStatus[layer] = s;
 #ifndef NOGUI
-            if (m_ui)
-                m_lmsUi->m_aw->playbackChanged(layer, s);
+            if (m_ui) m_lmsUi->m_aw->playbackChanged(layer, s);
 #endif
         }
     }
@@ -120,13 +118,23 @@ void libreMediaServerAudio::dmxInput(int layer, int channel, int value)
 
 #ifndef NOGUI
 void libreMediaServerAudio::refreshUi() {
-    if (!m_ui)
-        return;
+    if (!m_ui) return;
     for (int i= 0; i < Settings::getInstance()->getLayersNumber(); i++ ) {
-        Status s = m_mae.getStatus(i);
+        Status s = m_currentStatus[i];
         if (s == Status::PlayingOnce || s == Status::PlayingLoop) {
             m_lmsUi->m_aw->cursorChanged(i, m_mae.getCursor(i));
-        //m_lmsUi->m_aw->playbackChanged(i, s);
+        }
+        if (m_updateUi[i][0] >= 0) {
+            m_lmsUi->m_aw->volChanged(i, m_updateUi[i][0]);
+            m_updateUi[i][0] = -1;
+        }
+        if (m_updateUi[i][1] >= 0) {
+            m_lmsUi->m_aw->panChanged(i, m_updateUi[i][1]);
+            m_updateUi[i][1] = -1;
+        }
+        if (m_updateUi[i][2] >= 0) {
+            m_lmsUi->m_aw->pitchChanged(i, m_updateUi[i][2]);
+            m_updateUi[i][2] = -1;
         }
     }
 }
diff --git a/src/libremediaserver-audio.h b/src/libremediaserver-audio.h
index 6b80f97..9782d88 100644
--- a/src/libremediaserver-audio.h
+++ b/src/libremediaserver-audio.h
@@ -44,10 +44,12 @@ private:
     MediaLibrary *m_mediaLibrary;
     MiniAudioEngine m_mae;
     QString m_currentMedia[MAX_LAYERS];
+    Status m_currentStatus[MAX_LAYERS];
 #ifndef NOGUI
     bool m_ui;
     QTimer *m_refreshUi;
     libreMediaServerAudioUi *m_lmsUi;
+    int m_updateUi[MAX_LAYERS][3];
 #endif
 
 private slots:
diff --git a/src/miniaudioengine.cpp b/src/miniaudioengine.cpp
index 1f2c0b4..8dc38da 100644
--- a/src/miniaudioengine.cpp
+++ b/src/miniaudioengine.cpp
@@ -2,7 +2,9 @@
 
 MiniAudioEngine::MiniAudioEngine()
 {
-
+    for (int i =0; i < MAX_LAYERS; i++) {
+        m_mediaLoaded[i] = false;
+    }
 }
 
 void MiniAudioEngine::audioDataCallback(ma_device* pDevice, void* pOutput, const void* pInput, ma_uint32 frameCount)
@@ -194,6 +196,7 @@ void MiniAudioEngine::volChanged(int layer, float vol)
     if (m_mediaLoaded[layer] == false)
         return;
     ma_sound_group_set_volume(&m_currentSound[layer], vol);
+    qDebug() << "vol: " << vol;
 }
 
 void MiniAudioEngine::panChanged(int layer, float value)
@@ -255,7 +258,7 @@ void MiniAudioEngine::setCursor(int layer, int cursor)
 
 Status MiniAudioEngine::getStatus(int layer)
 {
-    if (m_mediaLoaded[layer] == ma_bool8(false))
+    if (m_mediaLoaded[layer] == false)
         return Status::Iddle;
     if (ma_sound_is_playing(&m_currentSound[layer])) {
         if (ma_sound_is_looping(&m_currentSound[layer]))
diff --git a/src/slidergroup.cpp b/src/slidergroup.cpp
index e58588e..6120093 100644
--- a/src/slidergroup.cpp
+++ b/src/slidergroup.cpp
@@ -57,6 +57,11 @@ void SliderGroup::sliderValueChanged(int value)
 
 void SliderGroup::setValue(float value)
 {
-    slider->setValue(value);
+    slider->blockSignals(true);
+    valueBox->blockSignals(true);
+    if (int(value) != slider->value())
+        slider->setValue(value);
     valueBox->setValue(value);
+    slider->blockSignals(false);
+    valueBox->blockSignals(false);
 }