--- a/DJMFix.h	Fri Dec 18 21:35:36 2020 +0100
+++ b/DJMFix.h	Fri Dec 18 23:19:32 2020 +0100
@@ -17,21 +17,26 @@
 #pragma once
 
 #include <vector>
-#include <functional>
 
 namespace djmfix {
 
 using MidiMessage = std::vector<uint8_t>;
-using MidiSender = std::function<void(MidiMessage) >;
+
+class MidiSender {
+public:
+	virtual ~MidiSender() = default;
+	virtual void send(MidiMessage midiMessage) = 0;
+};
 
 class DJMFix {
 public:
 	virtual ~DJMFix() = default;
+	virtual void setMidiSender(MidiSender* midiSender) = 0;
 	virtual void receive(MidiMessage midiMessage) = 0;
 	virtual void start() = 0;
 	virtual void stop() = 0;
 };
 
-DJMFix* create(MidiSender midiSender);
+DJMFix* create();
 
 }