Simple Midi In Setup

SimpleMidiInSetup.cpp

#include <iostream>
#include <AudioToolbox/AudioToolbox.h>

int main (int argc, char * const argv[]) {
	AUGraph graph;
	AUNode outputNode, mixerNode, synthNode;
	AudioUnit synthUnit;

	//Setup Graph
	NewAUGraph(&graph);

	AudioComponentDescription cd;
	cd.componentManufacturer = kAudioUnitManufacturer_Apple;
	cd.componentFlags = 0;
	cd.componentFlagsMask = 0;
	cd.componentType = kAudioUnitType_Output;
	//cd.componentSubType = kAudioUnitSubType_HALOutput;
	cd.componentSubType = kAudioUnitSubType_DefaultOutput;

	AUGraphAddNode(graph, &cd, &outputNode);
	AUGraphOpen(graph);
	AUGraphInitialize(graph);
	AUGraphStart(graph);

	//New NODES
	cd.componentManufacturer = kAudioUnitManufacturer_Apple;
	cd.componentFlags = 0;
	cd.componentFlagsMask = 0;
	cd.componentType = kAudioUnitType_MusicDevice;
	cd.componentSubType = kAudioUnitSubType_DLSSynth;

	AUGraphAddNode(graph, &cd, &synthNode);
	AUGraphNodeInfo(graph, synthNode, NULL, &synthUnit);

	cd.componentManufacturer = kAudioUnitManufacturer_Apple;
	cd.componentFlags = 0;
	cd.componentFlagsMask = 0;
	cd.componentType = kAudioUnitType_Mixer;
	cd.componentSubType = kAudioUnitSubType_StereoMixer;

	AUGraphAddNode(graph, &cd, &mixerNode);

	//Connect NODES
	AUGraphConnectNodeInput(graph, mixerNode, 0, outputNode, 0);
	AUGraphConnectNodeInput(graph, synthNode, 0, mixerNode, 0);
	//Update Graph
	AUGraphUpdate(graph,NULL);

	//send program changes and notes
	//using 3 different channels
	MusicDeviceMIDIEvent(synthUnit, 0xC0, 40, 0, 0);
	MusicDeviceMIDIEvent(synthUnit, 0xC1, 9, 0, 0);
	MusicDeviceMIDIEvent(synthUnit, 0xC2, 104, 0, 0);
	sleep(1);
	MusicDeviceMIDIEvent(synthUnit, 0x90, 60, 80, 0);
	sleep(1);
	MusicDeviceMIDIEvent(synthUnit, 0x80, 60, 0, 0);
	MusicDeviceMIDIEvent(synthUnit, 0x91, 60, 80, 0);
	sleep(1);
	MusicDeviceMIDIEvent(synthUnit, 0x81, 60, 0, 0);
	MusicDeviceMIDIEvent(synthUnit, 0x92, 60, 80, 0);
	sleep(1);
	MusicDeviceMIDIEvent(synthUnit, 0x82, 60, 0, 0);

	return 0;
}