1 #!/usr/bin/env python 1 #!/usr/bin/env python 2 2 3 import os 3 import os 4 import random 4 import random 5 import sys 5 import sys 6 import time 6 import time 7 random.seed(time.time()) 7 random.seed(time.time()) 8 8 > 9 def main(): > 10 key = "C" 9 grammars = { | 11 note_grammars = { 10 "u": ["I V I IV u", "I IV", "I VII IV" , "e"], | 12 "u": ["I V I IV u", "I IV", "I VII IV" , "e"], 11 "e": [""], | 13 "e": [""], 12 } | 14 } > 15 chord_grammars = { > 16 "u": ["I IV V IV I", "e"], > 17 "e": [""] 13 | 18 } > 19 compose_piece(key, note_grammars) > 20 compose_piece(key, chord_grammars, chords=True) 14 21 15 def main(): < 16 key = "G#" < > 22 def compose_piece(key, grammars, chords=False): 17 score = "" 23 score = "" 18 while len(score.split()) < 50: | 24 while len(score.split()) < 15: 19 score = "u u u" 25 score = "u u u" 20 score = generate_score(score) | 26 score = generate_score(score, grammars) 21 score = keyify_score(score, key) | 27 score = transliterate_score(score, key, chords) 22 score = generate_csound_score(score) 28 score = generate_csound_score(score) 23 print "f1 0 256 10 1 0 3 ; sine wave function table" 29 print "f1 0 256 10 1 0 3 ; sine wave function table" 24 for line in score: 30 for line in score: 25 print line 31 print line 26 32 27 33 28 def make_scale(key): 34 def make_scale(key): ................................................................................................................................................................................ 32 progression = [2,2,1,2,2,2,1] 38 progression = [2,2,1,2,2,2,1] 33 for p in progression: 39 for p in progression: 34 pos = (pos + p) % 12 40 pos = (pos + p) % 12 35 scale.append(notes[pos]) 41 scale.append(notes[pos]) 36 return scale 42 return scale 37 43 38 44 39 def generate_score(score): | 45 def generate_score(score, grammars): 40 while 1: 46 while 1: 41 found_substitution = False 47 found_substitution = False 42 for key,value in grammars.iteritems(): 48 for key,value in grammars.iteritems(): 43 if score.find(key) != -1: 49 if score.find(key) != -1: 44 found_substitution = True 50 found_substitution = True 45 while score.find(key) != -1: 51 while score.find(key) != -1: 46 score = score.replace(key, random.choice(grammars[key]), 1) 52 score = score.replace(key, random.choice(grammars[key]), 1) 47 if found_substitution is False: 53 if found_substitution is False: 48 break 54 break 49 return score 55 return score 50 56 51 def keyify_score(score, key): | 57 def transliterate_score(score, key, chords=False): 52 scale = make_scale(key) 58 scale = make_scale(key) 53 scale_conversion = { 59 scale_conversion = { 54 "I": 1, 60 "I": 1, 55 "II": 2, 61 "II": 2, 56 "III": 3, 62 "III": 3, 57 "IV": 4, 63 "IV": 4, 58 "V": 5, 64 "V": 5, 59 "VI": 6, 65 "VI": 6, 60 "VII": 7, 66 "VII": 7, 61 "VIII": 8, 67 "VIII": 8, 62 } 68 } 63 keyed_score = [] 69 keyed_score = [] > 70 if chords is False: 64 for token in score.split(): | 71 for token in score.split(): 65 keyed_score.append(scale[scale_conversion[token]-1]) | 72 keyed_score.append(scale[scale_conversion[token]-1]) > 73 else: > 74 for token in score.split(): > 75 chord = [] > 76 root_note_index = scale.index(key) + scale_conversion[token] > 77 chord.append(scale[root_note_index]) > 78 chord.append(scale[(root_note_index+3) % 8]) > 79 chord.append(scale[(root_note_index+5) % 8]) > 80 keyed_score.append(chord) 66 return keyed_score 81 return keyed_score 67 82 68 83 69 def generate_csound_score(score): 84 def generate_csound_score(score): 70 csound_note_values = { 85 csound_note_values = { 71 "C": "00", 86 "C": "00", 72 "C#": "01", 87 "C#": "01", ................................................................................................................................................................................ 80 "A": "09", 95 "A": "09", 81 "A#": "10", 96 "A#": "10", 82 "B": "11", 97 "B": "11", 83 } 98 } 84 t = 0 99 t = 0 85 csound_score = [] 100 csound_score = [] 86 for token in score: 101 for token in score: > 102 if isinstance(token, list): # Chords > 103 for note in token: > 104 note = csound_note_values[note] > 105 csound_score.append("i2 %(time)f 1 7000 %(octave)d.%(note)s %(oc > 106 t += 1 > 107 else: # Individual notes 87 note = csound_note_values[token] | 108 note = csound_note_values[token] 88 csound_score.append("i2 %f 2 7000 %d.%s %d.%s 0 6" % (t, random.choice([ < > 109 csound_score.append("i2 %(time)f 1 7000 %(octave)d.%(note)s %(octave 89 t += .25 | 110 t += .25 90 return csound_score 111 return csound_score 91 112 92 113 93 if __name__ == "__main__": main() 114 if __name__ == "__main__": main()