--- a/DJMFix.h	Sat Dec 19 17:33:16 2020 +0100
+++ b/DJMFix.h	Sat Dec 19 23:59:39 2020 +0100
@@ -32,7 +32,7 @@
 public:
 	virtual ~DJMFix() = default;
 	virtual void setMidiSender(MidiSender* midiSender) = 0;
-	virtual void receive(MidiMessage midiMessage) = 0;
+	virtual void receive(const MidiMessage& midiMessage) = 0;
 	virtual void start() = 0;
 	virtual void stop() = 0;
 };