MIDIDeviceRef

typedef struct OpaqueMIDIDevice * MIDIDeviceRef;();

Derives from MIDIObjectRef, does not have an owner object.

A MIDI device, which either attaches directly to the computer and is controlled by a MIDI driver, or which is "external," meaning that it is connected to a driver-controlled device via a standard MIDI cable.

A MIDIDeviceRef has properties and contains MIDIEntityRef's.