diff --git a/c++/widgets/pixmapkeyboard.cpp b/c++/widgets/pixmapkeyboard.cpp
index 1c2af78..08c13fa 100644
--- a/c++/widgets/pixmapkeyboard.cpp
+++ b/c++/widgets/pixmapkeyboard.cpp
@@ -113,6 +113,16 @@ PixmapKeyboard::PixmapKeyboard(QWidget* parent)
     setMode(HORIZONTAL);
 }
 
+void PixmapKeyboard::allNotesOff()
+{
+    m_enabledKeys.clear();
+
+    m_needsUpdate = true;
+    QTimer::singleShot(0, this, SLOT(updateOnce()));
+
+    emit notesOff();
+}
+
 void PixmapKeyboard::sendNoteOn(int note, bool sendSignal)
 {
     if (0 <= note && note <= 127 && ! m_enabledKeys.contains(note))
diff --git a/c++/widgets/pixmapkeyboard.h b/c++/widgets/pixmapkeyboard.h
index f25a6f3..1e84b3c 100644
--- a/c++/widgets/pixmapkeyboard.h
+++ b/c++/widgets/pixmapkeyboard.h
@@ -38,6 +38,7 @@ public:
 
     PixmapKeyboard(QWidget* parent);
 
+    void allNotesOff();
     void sendNoteOn(int note, bool sendSignal=true);
     void sendNoteOff(int note, bool sendSignal=true);
 
diff --git a/src/pixmapkeyboard.py b/src/pixmapkeyboard.py
index 99db4bc..264d86b 100644
--- a/src/pixmapkeyboard.py
+++ b/src/pixmapkeyboard.py
@@ -104,6 +104,14 @@ class PixmapKeyboard(QWidget):
         self.setCursor(Qt.PointingHandCursor)
         self.setMode(self.HORIZONTAL)
 
+    def allNotesOff(self):
+        self.m_enabledKeys = []
+
+        self.m_needsUpdate = True
+        QTimer.singleShot(0, self, SLOT("slot_updateOnce()"))
+
+        self.emit(SIGNAL("notesOff()"))
+
     def sendNoteOn(self, note, sendSignal=True):
         if 0 <= note <= 127 and note not in self.m_enabledKeys:
             self.m_enabledKeys.append(note)
diff --git a/src/shared_carla.py b/src/shared_carla.py
index a2a4f30..e6e58bb 100644
--- a/src/shared_carla.py
+++ b/src/shared_carla.py
@@ -1323,6 +1323,9 @@ class PluginWidget(QFrame, ui_carla_plugin.Ui_PluginWidget):
         if sendGui:      self.led_enable.setChecked(active)
         if sendCallback: Carla.Host.set_active(self.m_pluginId, active)
 
+        if active:
+            self.edit_dialog.keyboard.allNotesOff()
+
     def set_drywet(self, value, sendGui=False, sendCallback=True):
         if sendGui:      self.dial_drywet.setValue(value)
         if sendCallback: Carla.Host.set_drywet(self.m_pluginId, float(value)/1000)