#!/usr/bin/env python
import os
import random
import sys
import time
random.seed(time.time())
grammars = {
"u": ["I V I IV u", "e"],
"e": [""],
}
def main():
score = "u u u"
key = "C"
score = generate_score(score)
score = keyify_score(score, key)
score = generate_csound_score(score)
for line in score:
print line
def make_scale(key):
notes = ["A", "A#", "B", "C", "C#", "D", "D#", "E", "F", "F#", "G", "G#"]
scale = [key]
pos = notes.index(key)
progression = [2,2,1,2,2,2,1]
for p in progression:
pos = (pos + p) % 12
scale.append(notes[pos])
return scale
def generate_score(score):
while 1:
found_substitution = False
for key,value in grammars.iteritems():
if score.find(key) != -1:
found_substitution = True
while score.find(key) != -1:
score = score.replace(key, random.choice(grammars[key]), 1)
if found_substitution is False:
break
return score
def keyify_score(score, key):
scale = make_scale(key)
scale_conversion = {
"I": 1,
"II": 2,
"III": 3,
"IV": 4,
"V": 5,
"VI": 6,
"VII": 7,
"VIII": 8,
}
keyed_score = []
for token in score.split():
keyed_score.append(scale[scale_conversion[token]-1])
return keyed_score
def generate_csound_score(score):
csound_note_values = {
"C": "00",
"C#": "01",
"D": "02",
"D#": "03",
"E": "04",
"F": "05",
"F#": "06",
"G": "07",
"F#": "08",
"A": "09",
"A#": "10",
"B": "11",
}
t = 0
csound_score = []
for token in score:
note = csound_note_values[token]
csound_score.append("i2 %f 2 7000 %d.%s %d.%s 0 6" % (t, random.choice([8,9]), note, random.choice([8,9]), note))
t += .25
return csound_score
if __name__ == "__main__": main()