Implemented midi control of most buttons in drumpad tab

synthisizer.h

@@ -4,8 +4,6 @@
 
 #include "audioformat.h"
 
-namespace midi { class MidiMessage; }
-
 class DrumMachineSettings;
 
 class Synthisizer : public QObject
@@ -19,9 +17,6 @@ public:
 
     void writeSamples(frame_t *begin, frame_t *end);
 
-signals:
-    void sendMidi(const midi::MidiMessage &midiMsg);
-
 private:
     float m_volume{1.f};
     int16_t m_frequency{};