Generate a performance of Terry Riley's In C

in-c.py

import music21
import itertools
from random import randint

MIN_REPETITIONS = 4
MAX_REPETITIONS = 10

NUMBER_OF_PARTS = 10

motives = ['e4 e e', 'e8 f8 e4', 'r8 e f e', 'r8 e f g', 'e8 f g r', 
            "c'1~ c'1", 'r4 r r r8 c16 c c8 r r4 r r r', 'g1. f1~ f1',
            'b16 g r8 r4 r r', 'b16 g', 'f16 g b g b g', "e8 f b1 c'4",
            'b16 g8. g16 f g8 r8. g16~ g2.', "c'1 b g f#", 'g16 r8. r4 r r',
            "g16 a c' a", "b16 c' b c' b r", 'e16 f# e f# e8. e16', "r4. g'.", 
            'e16 f# e f# G8. d16 f# e f# e', 'f#2.', 'e4. e e e e f# g a b8',
            'e8 f#4. f# f# f# f# g a b4', 'e8 f# g4. g g g g a b8',
            'e8 f# g a4. a a a a b', 'e8 f# g a b4. b b b b', 'e16 f# e f# g8 e16 g f# e f# e',
            'e16 f# e f# e8. e16', "e2. g c'", "c'1.", 'g16 f g b g b',
            'f16 g f g b f~ f2. g4.', 'g16 f r8', 'g16 f', 
            "f16 g b g b g b g b g r8 r4 r r b- g'2. a'8 g'~ g' b'n a'4. g'8 e'2. f'8 f'#8~ f'#2. r4 r4 r8 e'8~ e'4 f'n1.", 
            'f16 g b g b g', 'f16 g', 'f16 g b', "b16 g f g b c'", 'b16 f', 
            'b16 g', "c'1 b a c'", "f'16 e' f' e' e'8 e' e' f'16 e'", 
            "f'8 e'8~ e' e' c'4", "d'4 d' g", "g16 d' e' d' r8 g r g r g g16 d' e' d'",
            "d'16 e'16 d'8", 'g1. g1 f~ f4', 'f16 g b- g b- g', 'f16 g', 'f16 g b-', 'g16 b-', 'b-16 g']

scoremotives = []

for tinymotive in motives:
  tinyStream = music21.tinyNotation.TinyNotationStream(tinymotive)
  realStream = music21.stream.Stream()
  for n in tinyStream:
    realStream.append(n)
  scoremotives.append(realStream)
  

score = music21.stream.Score()

def generatePart():
  part = music21.stream.Part()
  for motive in scoremotives:
    duration = randint(MIN_REPETITIONS, MAX_REPETITIONS)
    part.repeatAppend(motive, duration)
  return part

for i in range(NUMBER_OF_PARTS):
 score.insert(0, generatePart())

score.show()