def notate_score(musician_names, instrument_names, music):
score = Score()
for musician_name, instrument_name in zip(musician_names,
instrument_names):
instrument = get_instrument(instrument_name)
instrument.partName = instrument.instrumentName
instrument.partAbbreviation = instrument.instrumentAbbreviation
parts = []
part = Part()
parts.append(part)
part.insert(0, instrument)
score.insert(0, part)
score.insert(0, StaffGroup(parts))
notes = music[musician_name]
for pitches in notes:
if not pitches or pitches == 'stop':
note = Rest()
elif len(pitches) == 1:
pitch = Pitch(pitches[0] + 60)
note = Note(pitch)
else:
note = Chord(notes=[Pitch(p + 60) for p in pitches])
duration = Duration()
duration.fill([4.0])
note.duration = duration
part.append(note)
score.show('musicxml', '/Applications/Sibelius 7.5.app')
def make_music21_score(
part_names=('violin', 'flute', 'oboe', 'clarinet', 'alto_saxophone',
'trumpet', 'bass', 'percussion'),
title='Title',
composer='Jonathan Marmor',
time_signature=None,
starting_tempo_bpm=60,
starting_tempo_quarter_duration=1.0,
timestamp=None,
):
if not timestamp:
timestamp = datetime.datetime.utcnow()
metadata = Metadata()
metadata.title = title
metadata.composer = composer
metadata.date = timestamp.strftime('%Y/%m/%d')
score = Score()
score.insert(0, metadata)
for part_name in part_names:
instrument_name, instrument_number = parse_part_name(part_name)
instrument = instrument_data[instrument_name]
part = Part()
metronome_mark = MetronomeMark(
number=starting_tempo_bpm,
referent=Duration(starting_tempo_quarter_duration))
part.append(metronome_mark)
if time_signature:
# Should be a string like '12/8'
music21_time_signature = TimeSignature(time_signature)
part.append(music21_time_signature)
m21_instrument = instrument['class']()
m21_instrument.partName = instrument['name']
m21_instrument.partAbbreviation = instrument['abbreviation']
if instrument_number > 1:
m21_instrument.partName = '{} {}'.format(instrument['name'],
instrument_number)
m21_instrument.partAbbreviation = '{} {}'.format(
instrument['abbreviation'], instrument_number)
part.insert(0, m21_instrument)
clef = instrument.get('clef')
if clef:
part.append(clef())
score.insert(0, part)
return score
def write_notation_cell(music, path, event_index):
score = Score()
metadata = Metadata()
metadata.title = ''
metadata.composer = ''
score.insert(0, metadata)
layout = ScoreLayout()
layout.scalingMillimeters = 1.25
layout.scalingTenths = 40
score.insert(0, layout)
for musician in music:
instrument_name = musician['instrument']
instrument = get_instrument(instrument_name)
instrument.partName = instrument.instrumentName
if instrument.instrumentName is 'Violoncello':
instrument.partName = 'Cello'
instrument.partAbbreviation = instrument.instrumentAbbreviation
parts = []
part = Part()
parts.append(part)
part.insert(0, instrument)
score.insert(0, part)
# score.insert(0, StaffGroup(parts))
for event in musician['music']:
pitches = event['pitches']
dur = event['duration']
# if not pitches or pitches == 'stop':
# note = Rest()
if len(pitches) == 1:
pitch = Pitch(pitches[0] + 60)
note = Note(pitch)
else:
note = Chord(notes=[Pitch(p + 60) for p in pitches])
duration = Duration()
duration.fill([dur])
note.duration = duration
part.append(note)
file_path = os.path.join(path, str(event_index).zfill(2))
musicxml_file_path = file_path + '.xml'
png_output_file_path = file_path + '.png'
score.write('musicxml', musicxml_file_path)
write_png_with_musescore(musicxml_file_path, png_output_file_path, dpi=600)
def setup_parts(instruments, score):
parts = []
for instrument in instruments:
part = Part()
m21_instrument = get_instrument(instrument['name'])
part.insert(0, m21_instrument)
if instrument.get('clef') is 'bass':
part.insert(0, BassClef())
parts.append(part)
score.insert(0, part)
score.insert(0, StaffGroup(parts))
return parts
def generate_song(chord_length=15,show_symbols=False):
'''Generate a random chord progression with a piano/bass comp and
return as a Music21 score. Default length of 15 chord changes
(plus the fixed ones at start/end) makes a score about one A4 page.'''
# Start with a blank score
score = Score()
# TODO: Add swing rhythm indicator without having to do it manually
# in musescore (how to with music21?)
# Add tracks/intstruments - names etc will be set automatically
piano = Part()
piano.insert(0, Piano())
score.insert(0,piano)
bass = Part()
bass.insert(0, AcousticBass())
score.insert(0,bass)
#hihat = Part() TODO drum kit
# Get a random progression
prog = ProgressionGenerator()
prog.generate(chord_length)
# Go through the progression, adding a comp for each chord
for chord_choice in prog.chords:
roman = RomanNumeral(chord_choice) # Convert string into a generic Roman I/IV/etc chord
# Duration = eights until the next chord change.
# at least 1 bar on "important" chords (I,IV,V)
if chord_choice in ('Imaj7', 'IVmaj7', 'V7'):
duration = random.choice((8,8,8,8,10,10,12,12,14,16))
else: # 1 bar or less on "minor" (pun intended) chords
duration = random.choice((2,4,4,4,6,6,8,8,8,8))
add_piano_riff(roman, duration, piano, show_symbols)
add_bass_walk(roman, duration, bass)
# TODO drum part
# ending riff on last bar or two
duration = random.choice((8,8,16))
add_piano_closing(RomanNumeral('Imaj7'), duration, piano, show_symbols)
add_bass_closing(RomanNumeral('Imaj7'), duration, bass)
return score
from music21.instrument import fromString as get_instrument
from music21.clef import BassClef
timestamp = datetime.datetime.utcnow()
metadata = Metadata()
metadata.title = 'The Title'
metadata.composer = 'Jonathan Marmor'
metadata.date = timestamp.strftime('%Y/%m/%d')
score = Score()
score.insert(0, metadata)
part = Part()
parts = [part]
oboe = get_instrument('oboe')
part.insert(0, oboe)
score.insert(0, part)
score.insert(0, StaffGroup(parts))
for dur in [[1, .5], [.25], [.25, 2]]:
pitch = Pitch(60)
note = Note(pitch)
duration = Duration()
duration.fill(dur)
note.duration = duration
part.append(note)
score.show('musicxml', '/Applications/Sibelius 7.5.app')