Apple

Byte data_dn[] = { 0x90, 0x29, 0x80 };

Byte data_up[] = { 0x90, 0x29, 0x00 };

static OSStatus sendOnOff(MIDIEndpointRef endpointRef)

{

MIDITimeStamp timeStamp = 0; // AudioGetCurrentHostTime();

MIDIPacketList mpl;

MIDIPacket *mp;

OSStatus ret = 0;

struct timespec waitime = { 1, 0 };

mp = MIDIPacketListInit(&mpl);

mp = MIDIPacketListAdd(&mpl, sizeof(mpl), mp, timeStamp,

3, data_dn);

ret = MIDISend(gOutPort, endpointRef, &mpl);

nanosleep(&waitime, NULL);

waitime.tv_sec = 1;

mp = MIDIPacketListInit(&mpl);

mp = MIDIPacketListAdd(&mpl, sizeof(mpl), mp, timeStamp,

3, data_up);

ret = MIDISend(gOutPort, endpointRef, &mpl);

nanosleep(&waitime, NULL);

return ret;

}

int main (int argc, const char * argv[])

{

NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];

MIDIClientRef client = 0;

MIDIClientCreate(CFSTR("MIDI Test"), NULL, NULL, &client);

MIDIOutputPortCreate(client, CFSTR("Output Port"), &gOutPort);

ItemCount count = MIDIGetNumberOfDestinations();

bool finished = NO;

MIDIEndpointRef dest;

CFStringRef pname;

char name[64];

while (!finished) {

for (int i = 0; i < count; i++) {

dest = MIDIGetDestination(i);

MIDIObjectGetStringProperty(dest, kMIDIPropertyName, &pname);

CFStringGetCString(pname, name, sizeof(name), 0);

printf("Dest Endpoint Ref = %u\n", dest);

printf("Sending note on/off to '%s'\n", name);

sendOnOff(dest);

}

[pool drain];

return 0;

}

FWIW Snow Leopard, 10.6.7.

Thanks

Eric