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midkov.py
#!/usr/bin/python2
# coding: utf-8
import re, datetime, random, mido, sys, time
data = {}
def split(seq):
for i in range(len(seq) - 2):
yield tuple(seq[i:i+3])
def process(notes):
for note in split(notes):
key = note[:2]
value = note[2]
data[key] = data.get(key, []) + [value]
def get_next_note(seq):
notes = tuple(gen_notes(seq[-2:]))
return random.choice(data.get(notes, []))
mnotes = {}
def get_or_create_note(*args):
mnotes[args] = mnotes.get(args, mido.Message("note_on", note=args[0], velocity=args[1], time=args[2]))
return mnotes[args]
def gen_notes(notes):
for note in notes:
yield get_or_create_note(note.note, note.velocity, note.time)
if __name__ == "__main__":
midi = mido.MidiFile(sys.argv[1])
notes = [note for note in midi.get_messages() if "note_" in note.type]
new_notes = gen_notes(notes)
process(list(new_notes))
out = mido.open_output(mido.get_output_names()[1]) # HARDCODED FOR MY MIDI DEVICE
onote = notes[4]
note = notes[5]
while True:
time.sleep(note.time/200.0)
new_note = get_next_note((onote, note))
out.send(new_note)
print new_note
onote = note
note = new_note
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