def m21(self): score = Score() part = Part() bars = len(self) // self.bar_size measure = Measure() measure.insert(0.0, self.meter.m21) for bar in range(bars): start = bar * self.bar_size end = (bar + 1) * self.bar_size positions = [position % self.bar_size for position in self.iter_onset_positions(start=start, end=end) ] # Append an extra position to make sure that the last ioi is # between the last note and the end of the bar positions.append(self.bar_size) offsets = [self.get_offset(p) for p in positions] iois = [b - a for a, b in zip(offsets[:-1], offsets[1:])] for offset, ioi in zip(offsets[:-1], iois): note = Note('a5') note.duration.quarterLength = ioi * 4.0 measure.insert(offset * 4.0, note) part.append(measure) measure = Measure() score.append(part) return score.makeMeasures()
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 _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 __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 removeDuplicateTimeSigs(partToAdjust: stream.Part): currentTS = 'FAKE' timeSignatures = partToAdjust.recurse().getElementsByClass('TimeSignature') for ts in timeSignatures: if ts.ratioString == currentTS: partToAdjust.remove(ts, recurse=True) else: currentTS = ts.ratioString return partToAdjust
def matchParts(referencePart: stream.Part, partToAdjust: stream.Part): """ Resolve differences between two parts (here a score template and analysis part) with one defined as the reference part (score) and the other to be adjusted (analysis). Changes made: 1. Number of measures. Often analyses have fewer measures than scores as the last chord is reached before the last measure, and those 'empty' measures are not explicitly encoded. This function adds empty measures to the analysis, padding it out so that they match up. 2. Last measure duration. In the case of a part with an anacrusis, the first measures and last measure are incomplete: their combined value is equal to one full measure. Romantext supports the encoding of an anacrustic initial measure (e.g. m0 b3) but there is no equivalent way of setting the final measure's duration. This function shortens the final measure's duration to match that of the score in the case of a part with anacrusis (no action otherwise). 3. Remove duplicated (redundant) time signatures. Where analyses have repeat measures, and where those measures have a time signature, the time signature is repeated leading to duplicates that are redundant. This is especially common when repeating the first measure. This function removes those redundant time signatures. TODO: promote this up to Roman text itself. :param referencePart: the 'model' part, defining the 'correct' values. :param partToAdjust: the part to alter according to values in the referencePart. :return: partToAdjust, altered. """ # First and last measure duration referenceMeasures = referencePart.getElementsByClass('Measure') adjustMeasures = partToAdjust.getElementsByClass('Measure') measureDiff = len(referenceMeasures) - len(adjustMeasures) if measureDiff > 0: for x in range(measureDiff): partToAdjust.append(stream.Measure()) # Anacrusis: incomplete first and last measures refFirst = referenceMeasures[0] if refFirst.duration != refFirst.barDuration: # i.e. anacrusis refLast = referenceMeasures[-1] if refLast.duration != refLast.barDuration: adjustLast = adjustMeasures.getElementsByClass('Measure')[-1] adjustLast.splitAtQuarterLength(refLast.duration.quarterLength) removeDuplicateTimeSigs(partToAdjust) return partToAdjust
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 __init__(self, part_obj: StreamPart): self.instrument = part_obj.partName self.notes = part_obj.notes # self.notes_and_rests = part_obj.notesAndRests self.pitch_differences = [] self.harmony = None self.roman_numerals = None self.pitch_vector = None self.duration_progression = None self.get_pitch_differences() self.chord_progression = part_obj.chordify() self.get_harmonic_reduction() self.convert_harmonic_to_roman_numerals() self.get_duration_progression()
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 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 parse_track(part: Part, resolution=DEFAULT_RESOLUTION) -> Track: """Return track parsed from a music21 Part object. Parameters ---------- part : `music21.stream.Part` Part object to parse. resolution : int, optional Time steps per quarter note. Defaults to `muspy.DEFAULT_RESOLUTION`. Returns ------- :class:`muspy.Track` Parsed track. """ notes, chords = parse_notes_and_chords(part, resolution) instrument = part.getInstrument() if instrument.midiProgram is not None: program = instrument.midiProgram else: program = 0 if instrument.midiChannel is not None: is_drum = instrument.midiChannel == 10 else: is_drum = False return Track( program=program, is_drum=is_drum, name=part.partName, notes=notes, chords=chords, )
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
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)
def part(sequence): part = Part() for elem in sequence: part.append(elem) return part
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 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
def CompileSong(ClassifiedStream=None, FileName=str(), ClosestApprox=True, UpperApprox=False, Split=False): if ClosestApprox and UpperApprox: #closest approximation is preferred if both are active UpperApprox = False #turning off upper semiton approximation if not ClosestApprox and not UpperApprox: #ensuring there is an approximation method ClosestApprox = True #default approximation method UpperSemitone =\ { 'C-': 'C', 'C': 'C', 'C#': 'D', 'D-': 'D', 'D': 'D', 'D#': 'E', 'E-': 'E', 'E': 'E', 'E#': 'F', 'F-': 'F', 'F' : 'F', 'F#': 'G', 'G-': 'G', 'G': 'G', 'G#': 'A', 'A-': 'A', 'A': 'A', 'A#': 'B', 'B-': 'B', 'B': 'B', 'B#': 'C', } #upper approximation map ClosestSemitone =\ { 'C-': 'C', 'C': 'C', 'C#': 'C', 'D-': 'D', 'D': 'D', 'D#': 'D', 'E-': 'E', 'E': 'E', 'E#': 'E', 'F-': 'F', 'F' : 'F', 'F#': 'F', 'G-': 'G', 'G': 'G', 'G#': 'G', 'A-': 'A', 'A': 'A', 'A#': 'A', 'B-': 'B', 'B': 'B', 'B#': 'B', } #clostest approximation map for Part in ClassifiedStream: #for loop for every part for Element in Part[:]: #for loop for every element if Element[ 'Type'] == 'Part': #checking if the element is a stream part Part.remove(Element) elif Element['Type'] == 'Key': #checking if the element is key Element['Extra'] = str( Element['Extra'].tonic.name + ' ' + Element['Extra'].mode) #turning key to string elif Element['Type'] == 'Note': #checking if the element is a note if ClosestApprox: #checking the approximation method Element['Sound'] = ClosestSemitone[ Element['Sound']] #remapping the sound elif UpperApprox: #checking the approximation method Element['Sound'] = UpperSemitone[ Element['Sound']] #remapping the sound elif Element['Type'] == 'Chord': #checkinf the element is a chord if ClosestApprox: #checking the approximation method Element['Sound'] = [ ClosestSemitone[Note] for Note in Element['Sound'] ] #remapping the sound elif UpperApprox: #checking the approximation method Element['Sound'] = [ UpperSemitone[Note] for Note in Element['Sound'] ] #remapping the sound if Split: #check if the user wants to split tracks Tracks = [i for i in 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'] #name for subtracks if len(Tracks) > len( ClassifiedStream): #check what element has more tracks for i in range(len(ClassifiedStream) ): #for loop for every track in the MIDI file FilePart = f'MappedSongs/{FileName}[{Tracks[i]}].cmid' #new name of the file Part = [ClassifiedStream[i]] #list of single part of MIDI file with open(FilePart, 'wb') as OutputFile: #creating a compiled file Data = Dumps(Part, protocol=HighestProtocol) #serializing data OutputFile.write(Data) #writing data to the file else: for i in range( len(Tracks) ): #for loop for every track in the MIDI file (will cut all the tracks next to 26) FilePart = f'MappedSongs/{FileName}[{Tracks[i]}].cmid' #new name of the file Part = [ClassifiedStream[i]] #list of single part of MIDI file with open(FilePArt, 'wb') as OutputFile: #creating a compiled file Data = Dumps(Part, protocol=HighestProtocol) #serializing data OutputFile.write(Data) #writing data to the file else: FileName = f'MappedSongs/{FileName}.cmid' #completed file name + path with open(FileName, 'wb') as OutputFile: #creating a compiled file Data = Dumps(ClassifiedStream, protocol=HighestProtocol) #serializing data OutputFile.write(Data) #writing data to the file
def read_vmf_string(vmf_string): """ Reads VMF data from a string to a Score Stream. :param vmf_string: The contents of the VMF file as a string. :return: A music21 score instance containing the music in the VMF file. """ parts_converted = {} vmf = json.loads(vmf_string) # create a score score = Score() # Get the initial data number_of_parts = vmf['header']['number_of_parts'] number_of_voices = vmf['header']['number_of_voices'] smallest_note = float(Fraction(vmf['header']['tick_value'])) # create the parts and first measure. for voice_number in range(number_of_parts): part = Part() voice = Voice() part.append(voice) score.append(part) # get the body of the vmf body = vmf['body'] part_number = 0 # We do this because we want to do each part at a time. for voice_number in range(number_of_voices): # Get all ticks for a given part. part = [tick[voice_number] for tick in body] current_element = None current_voice = None # iterate over each tick for tick in part: if current_voice is None: # Get the parent part if it exists. try: current_part = parts_converted[tick[-1]] # add a new voice and write to it. voice = Voice() initial_key_signature = KeySignature(vmf['header']['key_signature']['0.0']) initial_time_signature = TimeSignature(vmf['header']['time_signature']['0.0']) voice.append(initial_key_signature) voice.append(initial_time_signature) current_part.append(voice) except KeyError: # Add it to our dictionary otherwise. current_part = score.parts[part_number] part_number += 1 parts_converted[tick[-1]] = current_part # Get the last voice. current_voice = current_part.voices[-1] if tick[0] == 1: if current_element is not None: # check for precision and adjust rounded = round(current_element.quarterLength) if abs(current_element.quarterLength - rounded) < PRECISION: current_element.quarterLength = rounded # append to the part current_voice.append(current_element) # Find how many notes to write. This will always be an int. number_of_notes = int(find_number_of_notes_in_tick(tick)) if number_of_notes == 1: # create a new note current_element = Note(Pitch(pitchClass=tick[3], octave=tick[4])) else: pitches = [] # create the pitches. # From the beginning to the end of the pitch section of the tick. for i in range(FIRST_PITCH_INDEX, FIRST_PITCH_INDEX + 2 * number_of_notes, 2): pitch = Pitch(pitchClass=tick[i], octave=tick[i + 1]) pitches.append(pitch) # create a new chord with these pitches. current_element = Chord(pitches) # set the velocity of the note. current_element.volume.velocity = DynamicConverter.vmf_to_velocity(tick[DYNAMIC_BIT]) # set the articulation if tick[ARTICULATION_BIT] != 0: current_element.articulations.append( ArticulationConverter.vmf_to_articulation(tick[ARTICULATION_BIT])) # set the value for this tick. current_element.quarterLength = smallest_note elif tick[0] == 2: # extend previous note current_element.quarterLength += smallest_note elif tick[0] == 0 and (isinstance(current_element, note.Note) or current_element is None): if current_element is not None: # check for precision and adjust rounded = round(current_element.quarterLength) if abs(current_element.quarterLength - rounded) < PRECISION: current_element.quarterLength = rounded # append to the part current_voice.append(current_element) # create new rest current_element = Rest() # Set the value for this tick. current_element.quarterLength = smallest_note elif tick[0] == 0 and isinstance(current_element, note.Rest): # extend previous rest. current_element.quarterLength += smallest_note # Append the last element in progress. if current_element is not None: # check for precision and adjust rounded = round(current_element.quarterLength) if abs(current_element.quarterLength - rounded) < PRECISION: current_element.quarterLength = rounded # append to the part current_voice.append(current_element) # create the stream for time signature changes time_signature_stream = Stream() for offset, time_signature_str in sorted(vmf['header']['time_signature'].items()): time_signature = TimeSignature(time_signature_str) time_signature_stream.append(time_signature) time_signature_stream[-1].offset = float(offset) # finish up the file. for part in score.parts: for voice in part.voices: voice.makeMeasures(inPlace=True, meterStream=time_signature_stream) for offset, t in sorted(vmf['header']['tempo'].items()): mm = tempo.MetronomeMark(number=t, referent=note.Note(type='quarter')) voice.insert(offset, mm) for offset, ks in sorted(vmf['header']['key_signature'].items()): voice.insert(offset, KeySignature(ks)) return score
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