A MIDI source or destination, owned by an entity.
- iOS 4.2+
- macOS 10.0+
- Mac Catalyst 13.0+
- tvOS 10.0+
- Core MIDI
Derives from MIDIObjectRef, owned by a MIDIEntityRef, unless it is a virtual endpoint, in which case there is no owning entity.
Entities have any number of MIDIEndpointRef's, sources and destinations of 16-channel MIDI streams.