Multichannel CoreMidi Example

MultichannelCoreMidiExample.cpp

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

int main (int argc, char * const argv[]) {
	AUGraph graph;
	AUNode outputNode, mixerNode, dlsNodeA, dlsNodeB, dlsNodeC;
	AudioUnit dlsA, dlsB, dlsC;

	//Setup Graph
	NewAUGraph(&graph);
	CAComponent output('auou','ahal','appl');
	AUGraphAddNode(graph, &(output.Desc()), &outputNode);
	AUGraphOpen(graph);
	AUGraphInitialize(graph);
	AUGraphStart(graph);

	//New NODES
	CAComponent dls('aumu','dls ','appl');
	AUGraphAddNode(graph, &(dls.Desc()), &dlsNodeA);
	AUGraphNodeInfo(graph, dlsNodeA, NULL, &dlsA);
	AUGraphAddNode(graph, &(dls.Desc()), &dlsNodeB);
	AUGraphNodeInfo(graph, dlsNodeB, NULL, &dlsB);
	AUGraphAddNode(graph, &(dls.Desc()), &dlsNodeC);
	AUGraphNodeInfo(graph, dlsNodeC, NULL, &dlsC);
	CAComponent mixer('aumx','smxr','appl');
	AUGraphAddNode(graph, &(mixer.Desc()), &mixerNode);

	//Connect NODES
	AUGraphConnectNodeInput(graph,mixerNode,0,outputNode,0);
	AUGraphConnectNodeInput(graph,dlsNodeA,0,mixerNode,0);
	AUGraphConnectNodeInput(graph,dlsNodeB,0,mixerNode,1);
	AUGraphConnectNodeInput(graph,dlsNodeC,0,mixerNode,2);
	//Update Graph
	AUGraphUpdate(graph,NULL);

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

	//send program changes and notes
	//to each DLS on channel 0
	MusicDeviceMIDIEvent(dlsA, 0xC0, 40, 0, 0);
	MusicDeviceMIDIEvent(dlsB, 0xC0, 9, 0, 0);
	MusicDeviceMIDIEvent(dlsC, 0xC0, 104, 0, 0);
	sleep(1);
	MusicDeviceMIDIEvent(dlsA, 0x90, 60, 80, 0);
	sleep(1);
	MusicDeviceMIDIEvent(dlsA, 0x80, 60, 0, 0);
	MusicDeviceMIDIEvent(dlsB, 0x90, 60, 80, 0);
	sleep(1);
	MusicDeviceMIDIEvent(dlsB, 0x80, 60, 0, 0);
	MusicDeviceMIDIEvent(dlsC, 0x90, 60, 80, 0);
	sleep(1);
	MusicDeviceMIDIEvent(dlsC, 0x80, 60, 0, 0);
	
	return 0;
}