def setup_tracks(midi_file_out=None):
from tracks import melodies, cantus_firmus, key, meter, species, author
# Create a composition, and add the vocal tracks to it.
composition = Composition()
composition.set_title('Counterpoint Exercise', '')
composition.set_author(author, '')
# Set up our vocal 'tracks' with the notes, key, meter defined in tracks.py
tracks = {}
for voice in [Soprano, Alto, Tenor, Bass]:
if len(melodies[voice.name]):
tracks[voice.name] = Track(instrument=voice())
tracks[voice.name].add_bar(Bar(key=key, meter=meter))
tracks[voice.name].name = voice.name
for note in melodies[voice.name]:
tracks[voice.name].add_notes(*note)
composition.add_track(tracks[voice.name])
if midi_file_out is not None:
# Save the midi file!
write_Composition(midi_file_out, composition, verbose=True)
return composition, [], species
def main():
parser = OptionParser()
parser.add_option('-t', action='store_true', dest='from_tracks', help='Read tracks from tracks.py. If encountered, will ignore instructions to read from MIDI file.')
parser.add_option('-r', '--read-midi', dest='input_midi_file', help='Read tracks from midi provided MIDI_FILE. If encountered, will ignore instructions to write to MIDI file.', metavar='MIDI_FILE')
# We're only using species 1 parser.add_option('-s', '--species', dest='species', help='One of 1, 2, or 4. Only applies to MIDI files.', metavar='SPECIES', type='int', default=1)
parser.add_option('-w', '--write-midi', dest='output_midi_file', help='Write midi file OUTPUT_FILE', metavar='OUTPUT_FILE')
parser.add_option('-p', '--write-png', dest='png_file', help='Write printed music to PNG_FILE', metavar='PNG_FILE')
parser.add_option('-z', dest='typeset_midi_file', help="Testing option. Read in a midi file, but do not test it for errors. Can be used with -w, -p and -l", metavar='MIDI_FILE')
parser.add_option('-l', dest='lilypond_file', help="Testing option. Write lilypond string to LY_FILE.", metavar="LY_FILE")
parser.add_option('-g', '--guess', dest='guess', help='Guess the counterpoint for several missing notes')
parser.add_option('-f', '--fill-in', dest='fill_in', help='Create new counterpoint composition based on the piece.', metavar="PIECE_TYPE")
options, args = parser.parse_args()
if options.typeset_midi_file:
composition, bpm = MIDI_to_Composition(options.typeset_midi_file)
if options.png_file:
string = from_Composition(composition)
to_png(string, options.png_file)
if options.output_midi_file:
write_Composition(options.output_midi_file, composition, verbose=True)
if options.lilypond_file:
string = from_Composition(composition)
lf = open(options.lilypond_file, 'w')
lf.write(string)
lf.close()
return
errors = None
composition = None
species = options.species
fill_type = "guess" ## for testing
if options.from_tracks:
# read the tracks from tracks.py
composition, errors, species = setup_tracks(options.output_midi_file, fill_type)
elif options.input_midi_file:
# read the tracks from a midi file
composition, errors = setup_midi(options.input_midi_file)
if errors:
print >> sys.stderr, '%s: ERROR(S) ENCOUNTERED WHEN READING MUSIC:' % sys.argv[0]
print >> sys.stderr, '\n'.join(errors)
sys.exit(1)
elif composition is None:
parser.error('Insufficient arguments provided. Use the -h argument to display help.')
sys.exit(0)
# Compute any errors.
rulesets = [first_species, second_species, third_species, fourth_species]
error_dict = rulesets[species-1](composition)
# Convert the errors dict to a standard format
errors = standardize_errors(error_dict)
b = new belief(composition,"Bach",fill_type)
b.train()
b.test()
if options.png_file:
# Save the PNG
string = from_Composition(composition)
to_png(string, options.png_file)
if options.lilypond_file:
# save the Lilypond file
string = from_Composition(composition)
lf = open(options.lilypond_file, 'w')
lf.write(string)
lf.close()