Moved widgets in subfolder

synthisizer.h

@@ -1,24 +1,29 @@
 #pragma once
 
+#include <QObject>
+
 #include "audioformat.h"
 
 namespace midi { class MidiMessage; }
 
 class DrumMachineSettings;
 
-class Synthisizer
+class Synthisizer : public QObject
 {
 public:
+    float volume() const { return m_volume; }
+    void setVolume(float volume) { m_volume = volume; }
+
+    int16_t frequency() const { return m_frequency; }
     void setFrequency(int16_t frequency) { m_frequency = frequency; }
 
     void writeSamples(frame_t *begin, frame_t *end);
 
-    void messageReceived(const midi::MidiMessage &message);
-
 signals:
     void sendMidi(const midi::MidiMessage &midiMsg);
 
 private:
+    float m_volume{1.f};
     int16_t m_frequency{};
     int16_t m_actualFrequency{};
     double m_phase{};