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 import parse 8 9 9 def main(): 10 def main(): 10 key = "A" 11 key = "A" 11 note_grammars = { 12 note_grammars = { 12 "u": ["I V V V I I IV u u", "I IV u u", "I VII IV u u" , "e"], 13 "u": ["I V V V I I IV u u", "I IV u u", "I VII IV u u" , "e"], 13 "e": [""], 14 "e": [""], 14 } 15 } 15 chord_grammars = { 16 chord_grammars = { 16 "u": ["I IV V IV I u u", "I VII IV u u", "I V IV u u", "e"], | 17 "u": ['"I" "IV" "V" "IV" "I" u u', '"I" "VII" "IV" u u', '"I" "V" "IV" u 17 "e": [""] 18 "e": [""] 18 } 19 } 19 compose_piece(key, note_grammars) 20 compose_piece(key, note_grammars) 20 compose_piece(key, chord_grammars, chords=True) 21 compose_piece(key, chord_grammars, chords=True) 21 22 22 def compose_piece(key, grammars, chords=False): 23 def compose_piece(key, grammars, chords=False): 23 score = "" 24 score = "" 24 while len(score.split()) < 200: | 25 while len(score.split()) < 10: 25 score = "u u u" 26 score = "u u u" 26 score = generate_score(score, grammars) 27 score = generate_score(score, grammars) > 28 score = parse.parse(score) 27 score = transliterate_score(score, key, chords) 29 score = transliterate_score(score, key, chords) 28 score = generate_csound_score(score) 30 score = generate_csound_score(score) 29 print "f1 0 256 10 1 0 3 ; sine wave function table" 31 print "f1 0 256 10 1 0 3 ; sine wave function table" 30 for line in score: 32 for line in score: 31 print line 33 print line 32 34 33 35 ................................................................................................................................................................................ 46 while 1: 48 while 1: 47 found_substitution = False 49 found_substitution = False 48 for key,value in grammars.iteritems(): 50 for key,value in grammars.iteritems(): 49 if score.find(key) != -1: 51 if score.find(key) != -1: 50 found_substitution = True 52 found_substitution = True 51 while score.find(key) != -1: 53 while score.find(key) != -1: 52 score = score.replace(key, random.choice(grammars[key]), 1) 54 score = score.replace(key, random.choice(grammars[key]), 1) > 55 if len(score) > 200: > 56 score = score.replace("u", "") > 57 score = score.replace("e", "") > 58 return score 53 if found_substitution is False: 59 if found_substitution is False: 54 break 60 break 55 return score 61 return score 56 62 57 def transliterate_score(score, key, chords=False): 63 def transliterate_score(score, key, chords=False): 58 scale = make_scale(key) 64 scale = make_scale(key) 59 scale_conversion = { 65 scale_conversion = { ................................................................................................................................................................................ 64 "V": 5, 70 "V": 5, 65 "VI": 6, 71 "VI": 6, 66 "VII": 7, 72 "VII": 7, 67 "VIII": 8, 73 "VIII": 8, 68 } 74 } 69 keyed_score = [] 75 keyed_score = [] 70 if chords is False: 76 if chords is False: 71 for token in score.split(): | 77 for i in range(len(score)): 72 keyed_score.append(scale[scale_conversion[token]-1]) | 78 score[i].value = scale[scale_conversion[score[i].value]-1] 73 else: 79 else: 74 for token in score.split(): | 80 for i in range(len(score)): 75 chord = [] 81 chord = [] 76 root_note_index = scale.index(key) + scale_conversion[token] | 82 root_note_index = scale.index(key) + scale_conversion[score[i].value 77 chord.append(scale[root_note_index]) 83 chord.append(scale[root_note_index]) 78 chord.append(scale[(root_note_index+3) % 8]) 84 chord.append(scale[(root_note_index+3) % 8]) 79 chord.append(scale[(root_note_index+5) % 8]) 85 chord.append(scale[(root_note_index+5) % 8]) 80 keyed_score.append(chord) | 86 score[i].chord = chord 81 return keyed_score | 87 return score 82 88 83 89 84 def generate_csound_score(score): 90 def generate_csound_score(score): 85 csound_note_values = { 91 csound_note_values = { 86 "C": "00", 92 "C": "00", 87 "C#": "01", 93 "C#": "01", 88 "D": "02", 94 "D": "02", ................................................................................................................................................................................ 95 "A": "09", 101 "A": "09", 96 "A#": "10", 102 "A#": "10", 97 "B": "11", 103 "B": "11", 98 } 104 } 99 t = 0 105 t = 0 100 csound_score = [] 106 csound_score = [] 101 for token in score: 107 for token in score: 102 if isinstance(token, list): # Chords | 108 if isinstance(token, parse.Chord): # Chords 103 for note in token: | 109 for note in token.chord: 104 note = csound_note_values[note] 110 note = csound_note_values[note] 105 csound_score.append("i2 %(time)f 1 7000 %(octave)d.%(note)s %(oc 111 csound_score.append("i2 %(time)f 1 7000 %(octave)d.%(note)s %(oc 106 t += 1 112 t += 1 107 else: # Individual notes 113 else: # Individual notes 108 note = csound_note_values[token] | 114 note = csound_note_values[token.value] 109 csound_score.append("i2 %(time)f 1 7000 %(octave)d.%(note)s %(octave 115 csound_score.append("i2 %(time)f 1 7000 %(octave)d.%(note)s %(octave 110 t += .25 116 t += .25 111 return csound_score 117 return csound_score 112 118 113 119 114 if __name__ == "__main__": main() 120 if __name__ == "__main__": main()