APVTS: Send parameter change notifications more proactively

modules/juce_audio_processors/utilities/juce_AudioProcessorValueTreeState.cpp

@@ -65,6 +65,15 @@ bool AudioProcessorValueTreeState::Parameter::isAutomatable() const     { return
 bool AudioProcessorValueTreeState::Parameter::isDiscrete() const        { return discrete; }
 bool AudioProcessorValueTreeState::Parameter::isBoolean() const         { return boolean; }
 
+void AudioProcessorValueTreeState::Parameter::valueChanged (float newValue)
+{
+    if (lastValue == newValue)
+        return;
+
+    lastValue = newValue;
+    sendValueChangedMessageToListeners (newValue);
+}
+
 //==============================================================================
 class AudioProcessorValueTreeState::ParameterAdapter   : private AudioProcessorParameter::Listener
 {

modules/juce_audio_processors/utilities/juce_AudioProcessorValueTreeState.h

@@ -414,8 +414,11 @@ public:
         bool isBoolean() const override;
 
     private:
+        void valueChanged (float) override;
+
         const float unsnappedDefault;
         const bool metaParameter, automatable, discrete, boolean;
+        float lastValue = 0.0f;
     };
 
     //==============================================================================