def generateScore(chords, lengths=None, ts="4/4"):
"""Generates a four-part score from a sequence of chords.
Soprano and alto parts are displayed on the top (treble) clef, while tenor
and bass parts are displayed on the bottom (bass) clef, with correct stem
directions.
"""
if lengths is None:
lengths = [1 for _ in chords]
voices = [Voice([Piano()]) for _ in range(4)]
for chord, length in zip(chords, lengths):
bass, tenor, alto, soprano = [
Note(p, quarterLength=length) for p in chord.pitches
]
bass.addLyric(chord.lyric)
bass.stemDirection = alto.stemDirection = "down"
tenor.stemDirection = soprano.stemDirection = "up"
voices[0].append(soprano)
voices[1].append(alto)
voices[2].append(tenor)
voices[3].append(bass)
female = Part([TrebleClef(), TimeSignature(ts), voices[0], voices[1]])
male = Part([BassClef(), TimeSignature(ts), voices[2], voices[3]])
score = Score([female, male])
return score
def __init__(self, instruments):
self.names = ['vln', 'gtr']
self.vln = vln = Part()
self.gtr = gtr = Part()
self.l = [vln, gtr]
self.d = {}
for name, part, inst in zip(self.names, self.l, instruments.l):
part.id = name
self.d[name] = part
part.insert(0, inst)
def ParseMIDI(FilePath=str()): #this function parse midi creating a list
Majors =\
{
'C': 0, 'C#': -1, 'D-': -1, 'D': -2, 'D#': -3, 'E-': -3, 'E': -4, 'F': -5,
'F#': 6, 'G-': 6, 'G': 5, 'G#': 4,'A-': 4, 'A': 3, 'A#': 2, 'B-': 2, 'B': 1
} #major conversion
Minors =\
{
'C': -3, 'C#': -4, 'D-': -4,'D': -5, 'D#': 6, 'E-': 6, 'E': 5, 'F': 4,
'F#': 3, 'G-': 3, 'G': 2, 'G#': 1,'A-': 1, 'A': 0, 'A#': -1, 'B-': -1, 'B': -2
} #minor conversion
SemitoneShift = 0 #integer shifting for every note
File = Converter.parse(FilePath) #file reading
Key = File.analyze('key') #stream key extraction
if Key.mode == 'major': #checking if the key is in major
SemitoneShift = Majors[Key.tonic.name] #getting the shift
elif Key.mode == 'minor': #checking if the key is in minor
SemitoneShift = Minors[Key.tonic.name] #getting the shift
FileTransposed = File.transpose(SemitoneShift)
Stream = [Element
for Element in FileTransposed.recurse()] #stream list creation
Parts = [
Stream.index(Element) for Element in Stream
if type(Element) == type(Part())
] #getting indexes where to split
Parts.append(
len(Stream) - 1
) #adding the lenght of the stream to indexes (to get the end index of last part)
return [Stream[Start:End] for Start, End in zip(Parts[:-1], Parts[1:])
] #splitting stream in parts(instruments)
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 _matrix_to_part(self, submatrix):
'''
Takes a submatrix of size (T, D) and turn it into a music21.stream.Part
object, where T is the number of time slices, and dim is the note
vector.
'''
part = Part()
pitches = submatrix[:, 0]
articulations = submatrix[:, 1]
current_note = None
for current_tick in range(len(submatrix)):
if articulations[current_tick]: # if articulate
# append the old note
if current_note is not None: # for the first note
part.append(current_note)
# create a new note
if pitches[current_tick] < self.rest:
current_note = Note()
# assign pitch, inverse of self._midi_to_input()
current_note.pitch.midi = pitches[current_tick]
else:
current_note = Rest()
# resets the duration to the smallest amount
current_note.duration.quarterLength = self.unit_length
else:
current_note.duration.quarterLength += self.unit_length
return part
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 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
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 to_music21(music: "Music") -> Score:
"""Return a Music object as a music21 Score object.
Parameters
----------
music : :class:`muspy.Music`
Music object to convert.
Returns
-------
`music21.stream.Score`
Converted music21 Score object.
"""
# Create a new score
score = Score()
# Metadata
if music.metadata:
score.append(to_music21_metadata(music.metadata))
# Tracks
for track in music.tracks:
# Create a new part
part = Part()
part.partName = track.name
# Add tempos
for tempo in music.tempos:
part.append(to_music21_metronome(tempo))
# Add time signatures
for time_signature in music.time_signatures:
part.append(to_music21_time_signature(time_signature))
# Add key signatures
for key_signature in music.key_signatures:
part.append(to_music21_key(key_signature))
# Add notes to part
for note in track.notes:
m21_note = M21Note(_get_pitch_name(note.pitch))
m21_note.offset = note.time / music.resolution
m21_note.quarterLength = note.duration / music.resolution
part.append(m21_note)
# Append the part to score
score.append(part)
return score
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 get_part(length, list_value):
part = Part()
instrument_index = list_value.get({
'min': 0,
'max': len(INSTRUMENTS_CLASSES) - 1
})
instrument_class = INSTRUMENTS_CLASSES[instrument_index]
set_instrument(part, instrument_class())
for _ in range(length):
note_pred = list_value.get({'min': 0, 'max': 1}, is_int=False)
duration = list_value.get(DURATION, is_int=False)
is_chord = note_pred > 0.2
if is_chord:
num_of_notes = list_value.get(NUM_OF_NOTES)
velocity = list_value.get(VELOCITY)
notes = []
for _ in range(num_of_notes):
note = list_value.get(PITCH)
notes.append(note)
append_chord(part, notes, duration, velocity)
else:
append_rest(part, duration)
return part
def part(sequence):
part = Part()
for elem in sequence:
part.append(elem)
return part
def tensors_to_stream(outputs, config, metadata=None):
cur_measure_number = 0
parts = {}
for part_name in outputs.keys():
if part_name == 'extra':
continue
part = Part(id=part_name)
parts[part_name] = part
last_time_signature = None
cur_time_signature = '4/4'
for step in range(outputs['soprano'].shape[0]):
extra = outputs['extra'][step]
if extra[indices_extra['has_time_signature_3/4']].item() == 1:
cur_time_signature = '3/4'
elif extra[indices_extra['has_time_signature_4/4']].item() == 1:
cur_time_signature = '4/4'
elif extra[indices_extra['has_time_signature_3/2']].item() == 1:
cur_time_signature = '3/2'
cur_time_pos = extra[indices_extra['time_pos']].item()
has_fermata = extra[indices_extra['has_fermata']].item() == 1
if cur_time_pos == 1.0 or cur_measure_number == 0:
for part_name, part in parts.items():
part.append(Measure(number=cur_measure_number))
if cur_measure_number == 0:
if part_name in ['soprano', 'alto']:
part[-1].append(clef.TrebleClef())
else:
part[-1].append(clef.BassClef())
key = int(
torch.argmax(
outputs['extra'][0, indices_extra['has_sharps_0']:
indices_extra['has_sharps_11'] +
1],
dim=0).item())
if key >= 6:
key -= 12
part[-1].append(KeySignature(key))
part[-1].append(MetronomeMark(number=90))
cur_measure_number += 1
if last_time_signature is None or cur_time_signature != last_time_signature:
for part in parts.values():
part[-1].append(TimeSignature(cur_time_signature))
last_time_signature = cur_time_signature
for part_name, part in parts.items():
idx = torch.argmax(outputs[part_name][step]).item()
if idx == indices_parts['is_continued']:
try:
last_element = part[-1].flat.notesAndRests[-1]
cur_element = deepcopy(last_element)
if last_element.tie is not None and last_element.tie.type == 'stop':
last_element.tie = Tie('continue')
else:
last_element.tie = Tie('start')
cur_element.tie = Tie('stop')
except IndexError:
logging.debug(
'Warning: "is_continued" on first beat. Replaced by rest.'
)
cur_element = Rest(quarterLength=config.time_grid)
part[-1].append(cur_element)
elif idx == indices_parts['is_rest']:
part[-1].append(Rest(quarterLength=config.time_grid))
else:
pitch = Pitch()
part[-1].append(Note(pitch, quarterLength=config.time_grid))
# Set pitch value AFTER appending to measure in order to avoid unnecessary accidentals
pitch.midi = idx + min_pitches[part_name] - len(indices_parts)
if has_fermata:
for part in parts.values():
fermata = Fermata()
fermata.type = 'upright'
part[-1][-1].expressions.append(fermata)
score = Score()
if metadata is not None:
score.append(Metadata())
score.metadata.title = f"{metadata.title} ({metadata.number})"
score.metadata.composer = f"Melody: {metadata.composer}\nArrangement: BachNet ({datetime.now().year})"
for part in parts.values():
part[-1].rightBarline = 'light-heavy'
score.append(parts['soprano'])
if 'alto' in parts:
score.append(parts['alto'])
score.append(parts['tenor'])
score.append(parts['bass'])
score.stripTies(inPlace=True, retainContainers=True)
return score
key_name = key.step.upper() if key.mode == "major" else key.step.lower()
for note in notes:
if note.part == key.part and note.measure == key.measure:
note.step = Interval(noteStart=Note(Key(key_name).asKey().tonic), noteEnd=note._music21_object).semitones % 12
return notes
if __name__ == "__main__":
"""
How to create Mupix Objects.
"""
from music21.stream import Score, Part, Measure
from music21.key import KeySignature
from music21.note import Note # noqa
s = Score()
p1 = Part(id="part1")
m1 = Measure(number=1)
m1.append(KeySignature(3))
m1.append(Note("C4", type="eighth"))
m2 = Measure(number=2)
m2.append(KeySignature(0))
m2.append(Note("G4", type="eighth"))
p1.append([m1, m2])
s.append([p1])
notes = [NoteObject(item, 1) for item in s.recurse().notes if not item.isChord]
print(notes)
from music21.metadata import Metadata
from music21.duration import Duration
from music21.layout import StaffGroup
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)
def _setup_parts():
top = Part()
top.append(TimeSignature('4/4'))
bottom = Part()
bottom.append(TimeSignature('4/4'))
return top, bottom
