< sizeof (VstMidiEvent)
< sample frames related to the current block start sample position
< -64 to +63 cents; for scales other than 'well-tempered' ('microtuning')
< @see VstMidiEventFlags
< 1 to 3 MIDI bytes; midiData[3] is reserved (zero)
< (in sample frames) of entire note, if available, else 0
< Note Off Velocity [0, 127]
< offset (in sample frames) into note from note start if available, else 0
< zero (Reserved for future use)
< zero (Reserved for future use)
< #kVstMidiType
MIDI Event (to be casted from VstEvent).