diff --git a/simulation/Makefile b/simulation/Makefile
index 2766a89..d960a6c 100644
--- a/simulation/Makefile
+++ b/simulation/Makefile
@@ -12,7 +12,7 @@ else
 endif
 
 
-CXXFLAGS= $(CFLAGS) -std=c++14 -Wno-unused-parameter
+CXXFLAGS= $(CFLAGS) -std=c++14
 
 LIBS=-framework SDL2 -lc++ -lc -framework OpenGL
 LDFLAGS=-macosx_version_min 10.9 -rpath @executable_path/../Frameworks
diff --git a/simulation/src/simserial.cpp b/simulation/src/simserial.cpp
index 0ffd36e..60a7f92 100644
--- a/simulation/src/simserial.cpp
+++ b/simulation/src/simserial.cpp
@@ -42,7 +42,7 @@ void SimSerial::println(const char *str)
 }
 
 //Used to send serial midi
-void SimSerial::write(const uint8_t str)
+void SimSerial::write(const uint8_t __unused str)
 {
 
 }
diff --git a/simulation/src/simusbmidi.cpp b/simulation/src/simusbmidi.cpp
index 6de480e..42d1aa1 100644
--- a/simulation/src/simusbmidi.cpp
+++ b/simulation/src/simusbmidi.cpp
@@ -9,51 +9,52 @@
  */
 
 
-void SimUsbMidi::sendNoteOff(uint8_t note, uint8_t velocity, uint8_t channel, uint8_t cable)
+void SimUsbMidi::sendNoteOff(uint8_t note, uint8_t velocity, uint8_t channel, uint8_t __unused cable)
 {
 	printf( "[usbMIDI::noteOff] note %03d vel %03d ch %02d\n", note, velocity, channel);
 }
 
-void SimUsbMidi::sendNoteOn(uint8_t note, uint8_t velocity, uint8_t channel, uint8_t cable)
+void SimUsbMidi::sendNoteOn(uint8_t note, uint8_t velocity, uint8_t channel, uint8_t __unused cable)
 {
 	printf( "[usbMIDI::noteOn] note %03d vel %03d ch %02d\n", note, velocity, channel);
 }
 
-void SimUsbMidi::sendPolyPressure(uint8_t note, uint8_t pressure, uint8_t channel, uint8_t cable)
+void SimUsbMidi::sendPolyPressure(uint8_t note, uint8_t pressure, uint8_t channel, uint8_t __unused cable)
 {
 	printf( "[usbMIDI::polyPressure] note %03d p %03d ch %02d\n", note, pressure, channel);
 }
 
-void SimUsbMidi::sendAfterTouchPoly(uint8_t note, uint8_t pressure, uint8_t channel, uint8_t cable)
+void SimUsbMidi::sendAfterTouchPoly(uint8_t note, uint8_t pressure, uint8_t channel, uint8_t __unused cable)
 {
 	printf( "[usbMIDI::afterTouchPoly] note %03d p %03d ch %02d\n", note, pressure, channel);
 }
 
-void SimUsbMidi::sendControlChange(uint8_t control, uint8_t value, uint8_t channel, uint8_t cable)
+void SimUsbMidi::sendControlChange(uint8_t control, uint8_t value, uint8_t channel, uint8_t __unused cable)
 {
 	printf( "[usbMIDI::controlChange] cc %03d val %03d ch %02d\n", control, value, channel);
 }
 
-void SimUsbMidi::sendProgramChange(uint8_t program, uint8_t channel, uint8_t cable)
+void SimUsbMidi::sendProgramChange(uint8_t program, uint8_t channel, uint8_t __unused cable)
 {
 	printf( "[usbMIDI::programChange] prg %03d ch %02d\n", program, channel);
 }
 
-void SimUsbMidi::sendAfterTouch(uint8_t pressure, uint8_t channel, uint8_t cable)
+void SimUsbMidi::sendAfterTouch(uint8_t pressure, uint8_t channel, uint8_t __unused cable)
 {
 	printf( "[usbMIDI::afterTouch] p %03d ch %02d\n", pressure, channel);
 }
 
-void SimUsbMidi::sendPitchBend(int value, uint8_t channel, uint8_t cable)
+void SimUsbMidi::sendPitchBend(int value, uint8_t channel, uint8_t __unused cable)
 {
 	printf( "[usbMIDI::pitchBend] pb %05d ch %02d\n", value, channel);
 }
 
-void SimUsbMidi::sendSysEx(uint16_t length, const uint8_t *data, bool hasTerm, uint8_t cable)
+void SimUsbMidi::sendSysEx(uint16_t length, const uint8_t __unused *data, bool __unused hasTerm, uint8_t __unused cable)
 {
+	printf( "[usbMIDI::sysEx] len %d\n", length);
 }
 
-bool SimUsbMidi::read(uint8_t channel) {
+bool SimUsbMidi::read(uint8_t __unused channel) {
 	return false;
 }