Use CoreMIDI driver to send outcoming MIDI messages #488
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Currently CoreMIDI driver is used only for receiving MIDI messages which is strange, because it is capable of sending MIDI messages (it implements
MidiOutputinterface). This branch fixes this - it uses CoreMIDI drivedr for both input and output.Moreover, it creates MIDI virtual output (by
MIDISourceCreate), which can route MIDI messages to other applications (as opposed to outputting to hardware MIDI ports only).As a bonus, this branch implements error logging within CoreMIDI driver.