#!/usr/bin/env python
from __future__ import division
import os
import random
import sys
import time
random.seed(time.time())
import parse
def main():
key = "A"
bps = 60/60
tempo = 1/bps
max_duration = 1
composition = {
"overview": {
"melody": { # Instrument 'melody'
"score_line": "i2 %(time)f %(duration)f 7000 %(octave)d.%(note)s 2",
"octave": 8,
"duration": 40,
"grammars": { # Notes for this instrument to use in this piece
"u": ["I V/2 V/2 V/2 I VII, IV' I IV I VII IV"],
},
"score": "u",
},
"rhythm": {
"score_line": "i1 %(time)f %(duration)f 7000 %(octave)d.%(note)s %(octave)d.%(note)s 0 6",
"octave": 7,
"duration": 44,
"grammars": {
"u": ['(I) (ii)/4 (ii)/4 (IV)/2 (V)2 (IV) (ii) u', '(I) (vii) (III) u', '(I) (v) (IV) u u'],
},
"score": "u",
},
},
}
max_t = 0 # max time encountered so far. Used for movement timing
progression = "overview"
for comp_name in progression.split():
comp_start_time = max_t
for instr_name, instr in composition[comp_name].iteritems():
generated_score = generate_score(instr["score"], instr["grammars"]) # Fill in the scores by generating them based on the grammars
# print generated_score
score = parse.parse(generated_score, default_octave=instr["octave"]) # Return Node/Chord objects
# Generate timestamps for the notes
t = comp_start_time
for note in range(len(score)):
score[note].time = t
score[note].duration *= tempo
t += score[note].duration
# print "time difference =", t-comp_start_time
# print "instrument duration =",composition[comp_name][instr_name]["duration"]
if (t-comp_start_time) > float(composition[comp_name][instr_name]["duration"]):
# print "here"
score = score[:note]
break
max_t = t if t > max_t else max_t
composition[comp_name][instr_name]["score"] = score
# Must be done after all note times keyed in, else you can't coordinate melodies with the rhythm chords
print '''f1 0 512 10 1
f2 0 8192 10 .24 .64 .88 .76 .06 .5 .34 .08
f3 0 1025 10 1
'''
for comp_name in progression.split():
print "; Movement:", comp_name
for instr_name, instr in composition[comp_name].iteritems():
composition[comp_name][instr_name]["score"] = transliterate_score(composition[comp_name][instr_name]["score"], key)
# print "\nMovement %s instrument %s" % (comp_name, instr_name)
# print composition[comp_name][instr_name]["score"]
final_score = generate_csound_score(composition[comp_name][instr_name]["score"], composition[comp_name][instr_name]["score_line"])
for line in final_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, grammars):
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)
# print scoe
if len(score.split()) > 2000:
for k in grammars.keys():
score = score.replace(k, "")
return score
if found_substitution is False:
break
return score
def transliterate_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 i in range(len(score)):
if isinstance(score[i], parse.Note):
score[i].value = scale[scale_conversion[score[i].value]-1]
elif isinstance(score[i], parse.Chord):
chord = []
root_note_index = scale.index(key) + scale_conversion[score[i].value]
chord.append(scale[root_note_index])
chord.append(scale[(root_note_index+3) % 8])
if score[i].chord_type == "m": # Minor chords, flat the 5th
chord.append(scale[(root_note_index+4) % 8])
else:
chord.append(scale[(root_note_index+5) % 8])
score[i].chord = chord
elif isinstance(score[i], parse.Rest):
pass
return score
def generate_csound_score(score, score_line):
csound_note_values = {
"C": "00",
"C#": "01",
"D": "02",
"D#": "03",
"E": "04",
"F": "05",
"F#": "06",
"G": "07",
"G#": "08",
"A": "09",
"A#": "10",
"B": "11",
}
csound_score = []
for token in score:
if isinstance(token, parse.Chord): # Chords
for note in token.chord:
note = csound_note_values[note]
csound_score.append(score_line % {"time": token.time, "octave": token.octave, "note": note, "duration": token.duration})
elif isinstance(token, parse.Note): # Individual notes
note = csound_note_values[token.value]
csound_score.append(score_line % {"time": token.time, "octave": token.octave, "note": note, "duration": token.duration})
return csound_score
if __name__ == "__main__": main()