This addition to Animation Nodes allows users to use MIDI files to trigger their animations. This is applicable to animators who wish to animate to music, or want easy time triggers for procedurally gennerated animations.
My additions:
animation_nodes/data_structures/MIDINote.py
animation_nodes/data_structures/MIDITrack.py
animation_nodes/nodes/midi/
animation_nodes/sockets/MIDI_note.py
animation_nodes/sockets/MIDI_track.py