libremidi update to v5.4.3 and added virtual midi out as default

src/signal-manager.cpp

@@ -9,6 +9,7 @@
 #include <chrono>
 #include <memory>
 #include <thread>
+#include <mutex>
 
 namespace VISEQ::SIGNAL {
 
@@ -104,6 +105,7 @@ namespace VISEQ::SIGNAL {
                                         if(midinode->send_pitch_bend) midi.pitch_bend(m.second.i, midinode->getPitchBend().channel, midinode->getPitchBend().value);	
                                     }
                                 }
+                                if(midinode->send_note) midi.note(99, midinode->getNotes().channel, (int)Clamp(midinode->getNotes().note + s->midi_note_offset, 0, 127), midinode->getNotes().velocity, midinode->getNotes().gate);	
                                 s->last = s->next;
                                 s->next = next_node;
                             }