def split_voices(lead, current):
"""
Given two sequential notes, if the lead note contains more voices than current, then duplicate
the notes in current to match lead, producing continuous voice lines
:param lead: Leading note
:param current: Current node
"""
num_lead = get_number_of_voices(lead)
num_current = get_number_of_voices(current)
if current.isNote:
return [
Note(current.pitch, quarterLength=current.duration.quarterLength)
for i in range(num_lead)
]
if num_lead == num_current:
return [
Note(pitch, quarterLength=current.duration.quarterLength)
for pitch in current.pitches
]
if current.isChord and len(current.pitches) == 0:
raise RuntimeError(
"The system was able to parse the file, but detected an illegal construct: empty chord"
)
middle = map(itemgetter(0), [
sorted([(c, abs(Interval(e, c).cents)) for c in current.pitches],
key=itemgetter(1))[0] for e in lead.pitches[1:-1]
])
return [
Note(pitch, quarterLength=current.duration.quarterLength)
for pitch in chain(current.pitches[0:1], middle, current.pitches[-1:])
]
def test_2():
top, bot = _setup_parts()
top.append(Note('G4', quarterLength=0.25))
top.append(Rest(quarterLength=0.25))
bot.append(Note('G3', quarterLength=0.25))
bot.append(Rest(quarterLength=0.25))
return Score([top, bot])
def to_musicxml(sc_enc):
"Converts Chord tuples (see chorales.prepare_poly) to musicXML"
timestep = Duration(1. / FRAMES_PER_CROTCHET)
musicxml_score = Stream()
prev_chord = dict() # midi->(note instance from previous chord), used to determine tie type (start, continue, stop)
for has_fermata, chord_notes in sc_enc:
notes = []
if len(chord_notes) == 0: # no notes => rest for this frame
r = Rest()
r.duration = timestep
musicxml_score.append(r)
else:
for note_tuple in chord_notes:
note = Note()
if has_fermata:
note.expressions.append(expressions.Fermata())
note.midi = note_tuple[0]
if note_tuple[1]: # current note is tied
note.tie = Tie('stop')
if prev_chord and note.pitch.midi in prev_chord:
prev_note = prev_chord[note.pitch.midi]
if prev_note.tie is None:
prev_note.tie = Tie('start')
else:
prev_note.tie = Tie('continue')
notes.append(note)
prev_chord = { note.pitch.midi : note for note in notes }
chord = Chord(notes=notes, duration=timestep)
if has_fermata:
chord.expressions.append(expressions.Fermata())
musicxml_score.append(chord)
return musicxml_score
def generate_note(self, f0_info, n_duration, round_to_sixteenth=True):
f0 = f0_info[0]
a = remap(f0_info[1], self.cqt.min(), self.cqt.max(), 0, 1)
duration = librosa.frames_to_time(n_duration, sr=self.sr, hop_length=self.hop_length)
note_duration = 0.02 * np.around(duration / 0.02) # Round to 2 decimal places for music21 compatibility
midi_duration = second_to_quarter(duration, self.tempo)
midi_velocity = int(round(remap(f0_info[1], self.cqt.min(), self.cqt.max(), 80, 120)))
if round_to_sixteenth:
midi_duration = round(midi_duration * 16) / 16
try:
if f0 is None:
midi_note = None
note_info = Rest(type=self.mm.secondsToDuration(note_duration).type)
f0 = 0
else:
midi_note = round(librosa.hz_to_midi(f0))
note = Note(librosa.midi_to_note(midi_note), type=self.mm.secondsToDuration(note_duration).type)
note.volume.velocity = midi_velocity
note_info = [note]
except DurationException:
if f0 is None:
midi_note = None
note_info = Rest(type='32nd')
f0 = 0
else:
midi_note = round(librosa.hz_to_midi(f0))
note = Note(librosa.midi_to_note(midi_note),
type='eighth')
note.volume.velocity = midi_velocity
note_info = [note]
midi_info = [midi_note, midi_duration, midi_velocity]
n = np.arange(librosa.frames_to_samples(n_duration, hop_length=self.hop_length))
sine_wave = a * np.sin(2 * np.pi * f0 * n / float(self.sr))
return [sine_wave, midi_info, note_info]
def playNote(self, note):
p = Note(note)
p.quarterLength = 1.5
stream_obj = stream.Stream()
stream_obj.append(p)
sp = midi.realtime.StreamPlayer(stream_obj)
sp.play()
def to_musicxml(sc_enc):
"Converts Chord tuples (see chorales.prepare_poly) to musicXML"
timestep = Duration(1. / FRAMES_PER_CROTCHET)
musicxml_score = Stream()
prev_chord = dict(
) # midi->(note instance from previous chord), used to determine tie type (start, continue, stop)
for has_fermata, chord_notes in sc_enc:
notes = []
if len(chord_notes) == 0: # no notes => rest for this frame
r = Rest()
r.duration = timestep
musicxml_score.append(r)
else:
for note_tuple in chord_notes:
note = Note()
if has_fermata:
note.expressions.append(expressions.Fermata())
note.midi = note_tuple[0]
if note_tuple[1]: # current note is tied
note.tie = Tie('stop')
if prev_chord and note.pitch.midi in prev_chord:
prev_note = prev_chord[note.pitch.midi]
if prev_note.tie is None:
prev_note.tie = Tie('start')
else:
prev_note.tie = Tie('continue')
notes.append(note)
prev_chord = {note.pitch.midi: note for note in notes}
chord = Chord(notes=notes, duration=timestep)
if has_fermata:
chord.expressions.append(expressions.Fermata())
musicxml_score.append(chord)
return musicxml_score
def test_5():
top, bot = _setup_parts()
top.append(Note('G4', quarterLength=0.5))
top.append(Note('F4', quarterLength=0.5))
bot.append(Note('G3', quarterLength=0.5))
bot.append(Note('A3', quarterLength=0.5))
return Score([top, bot])
def main():
parser = get_cmd_line_parser(description=__doc__)
ParserArguments.filename(parser)
ParserArguments.tempo(parser)
ParserArguments.framerate(parser)
ParserArguments.set_defaults(parser)
ParserArguments.best(parser)
args = parser.parse_args()
defaults.framerate = args.framerate
song = Stream()
roots = 'ABCDEFG'
scales = [scale.MajorScale, scale.MinorScale,
scale.WholeToneScale, scale.ChromaticScale]
print('Choosing a random scale from Major, Minor, Whole Tone, Chromatic.')
rscale = random.choice(scales)(Pitch(random.choice(roots)))
print('Using: %s' % rscale.name)
print('Generating a score...')
random_note_count = 50
random_note_speeds = [0.5, 1]
print('100 Random 1/8th and 1/4th notes in rapid succession...')
for i in range(random_note_count):
note = Note(random.choice(rscale.pitches))
note.duration.quarterLength = random.choice(random_note_speeds)
song.append(note)
scale_practice_count = 4
print('Do the scale up and down a few times... maybe %s' %
scale_practice_count)
rev = rscale.pitches[:]
rev.reverse()
updown_scale = rscale.pitches[:]
updown_scale.extend(rev[1:-1])
print('updown scale: %s' % updown_scale)
for count, pitch in enumerate(cycle(updown_scale)):
print(' note %s, %s' % (count, pitch))
song.append(Note(pitch))
if count >= scale_practice_count * len(updown_scale):
break
print('Composition finished:')
song.show('txt')
if args.best:
print('Audifying the song to file "{}"...')
wave = audify_to_file(song, args.tempo, args.filename, verbose=True)
else:
wave = audify_basic(song, args.tempo, verbose=True)
print('Writing Song to file "{}"...'.format(args.filename))
with wav_file_context(args.filename) as fout:
fout.write_frames(wave.frames)
return 0
def test_write_arpeggio(self):
f = Note("F4")
a = Note("A4")
c = Note("C5")
f.duration.quarterLength = 4
a.duration.quarterLength = 4
c.duration.quarterLength = 4
arpeggio = stream.Stream()
for note in [f, a, c]:
arpeggio.append(note)
arpeggio.show()
def test_19():
"""
NB: This test is designed specifically to ensure that the _event_finder()
finds Rest objects when the happen at the same time as Note objects, when
only Rest objects are requested to be found.
"""
top, bot = _setup_parts()
top.append(Note('G4', quarterLength=0.5))
top.append(Note('G5', quarterLength=0.5))
bot.append(Note('G3', quarterLength=0.5))
bot.append(Rest(quarterLength=0.5))
return Score([top, bot])
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 test_18():
"""
NB: This test is designed specifically to ensure that the _event_finder()
doesn't stop processing when it doesn't find an element of the expected types
at an offset. You should ask it to look for Rest objects only.
"""
top, bot = _setup_parts()
top.append(Note('G4', quarterLength=0.5))
top.append(Rest(quarterLength=0.5))
bot.append(TimeSignature('4/4'))
bot.append(Note('G3', quarterLength=0.5))
bot.append(Rest(quarterLength=0.5))
return Score([top, bot])
def sheperd_tone(self,
notes_i,
length=0.5,
instrument_to_play=instrument.Piano()):
# Highest octave, volume gets lower
shepard_tone_u = stream.Part()
shepard_tone_u.insert(0, instrument_to_play)
c_major = [
'C#5', 'D#5', 'E#5', 'F#5', 'G#5', 'A#5', 'B#5', 'C#6', 'D#6',
'E#6', 'F#6', 'G#6', 'A#6', 'B#6'
]
c_major = [c_major[notes_i % len(c_major)]]
for i in c_major:
n = Note(i, quarterLength=length)
n.volume.velocityScalar = 0.7 - self.volume_increment_u
shepard_tone_u.append(n)
self.volume_increment_u = self.volume_increment_u + 0.05
# Middle octave, volume constant
shepard_tone_m = stream.Part()
shepard_tone_m.insert(0, instrument_to_play)
c_major = [
'C#3', 'D#3', 'E#3', 'F#3', 'G#3', 'A#3', 'B#3', 'C#4', 'D#4',
'E#4', 'F#4', 'G#4', 'A#4', 'B#4'
]
c_major = [c_major[notes_i % len(c_major)]]
for i in c_major:
n = Note(i, quarterLength=length)
shepard_tone_m.append(n)
# Lowest octave, volume gets higher
shepard_tone_l = stream.Part()
shepard_tone_l.insert(0, instrument_to_play)
c_major = [
'C#1', 'D#1', 'E#1', 'F#1', 'G#1', 'A#1', 'B#1', 'C#2', 'D#2',
'E#2', 'F#2', 'G#2', 'A#2', 'B#2'
]
c_major = [c_major[notes_i % len(c_major)]]
for i in c_major:
n = Note(i, quarterLength=length)
n.volume.velocityScalar = 0.05 + self.volume_increment_d
shepard_tone_l.append(n)
self.volume_increment_d = self.volume_increment_d + 0.05
return stream.Stream([shepard_tone_u, shepard_tone_m, shepard_tone_l])
def add_bass_closing(roman, duration, bass):
'''Generate a closing riff for the bassline, given chord and
duration in eighths'''
filled = 0
length_weight = 2 # Longer notes later in the bar
root = roman.root() # Root pitch of the chord (NOT a note object)
while filled < duration:
note = Note(deepcopy(root))
length = min(random.randint(1,length_weight),duration-filled) # cap at time left
note.quarterLength = length/2.0
note.octave -= 2
bass.append(note)
filled += length
length_weight += length # Longer notes later in the bar
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 rhythmLine(baseDuration = QuarterNote(), minLength = 8.0, maxProbability = 0.5):
newStream = stream.Stream()
while newStream.duration.quarterLength < minLength:
currentProbability = (newStream.duration.quarterLength / minLength) * maxProbability
newNote = Note()
newNote.duration = baseDuration.clone()
x = random.random()
while x < currentProbability:
print(x, currentProbability)
newNote.duration = alterRhythm(newNote.duration)
x = random.random()
newStream.append(newNote)
#newStream.getNoteTimeInfo()
return newStream
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 decorateScore(romantext, progression):
"""Decorate an annotated chorale into piano form.
Receives a romantext stream that has been properly voiced by the
dynamic programming algorithm, replacing the 1-part layout with a
2-part grand staff piano layout in SA-TB form.
"""
romanNumerals = romantext.recurse().getElementsByClass("RomanNumeral")
score = romantext.template(fillWithRests=False)
trebleStaff = score.parts[0]
bassStaff = copy.deepcopy(trebleStaff)
trebleStaff[0].insert(0, TrebleClef())
bassStaff[0].insert(0, BassClef())
for rn, pitches in zip(romanNumerals, progression):
b, t, a, s = [Note(p, quarterLength=rn.quarterLength) for p in pitches]
b.lyric = rn.lyric
trebleStaff.measure(rn.measureNumber).insert(rn.offset, s)
trebleStaff.measure(rn.measureNumber).insert(rn.offset, a)
bassStaff.measure(rn.measureNumber).insert(rn.offset, t)
bassStaff.measure(rn.measureNumber).insert(rn.offset, b)
staffGroup = StaffGroup(
[trebleStaff, bassStaff], name="Harmonic reduction", symbol="brace"
)
score.insert(0, bassStaff)
score.insert(0, staffGroup)
for measure in score.recurse().getElementsByClass("Measure"):
measure.makeVoices(inPlace=True)
return score
def add_step_information(notes, keySignatures):
"""
This function will populate the step information into Mupix note objects, it
is required because music21 will not keep key signature information in
measure other than the measure the key is defined in when reading musicXML.
The maintainers of music21 don't believe this is an issue and won't fix it,
so this and others must exist.
:param [notes]: A list of Mupix NoteObjects.
:type [notes]: List
:param [keySignatures]: A list of Mupix KeySignatureObjects.
:type [keySignatures]: List
:return [List]: The original list of Mupix NoteObjects (in order) with step information included.
:rtype: List
"""
for key in keySignatures:
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
def convert_string_to_notes(string, scale):
print('converting: %s' % string)
return [
Note(scale.pitchFromDegree(char),
quarterLength=get_random_note_length())
for char in bytearray(string, 'UTF-8')
]
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 generate_sine_midi_note(f0_info, sr, n_duration):
f0 = f0_info[0]
A = remap(f0_info[1], CdB.min(), CdB.max(), 0, 1)
duration = librosa.frames_to_time(n_duration, sr=fs, hop_length=hop_length)
# Generate music21 note
note_duration = 0.02 * np.around(
duration / 2 /
0.02) # Round to 2 decimal places for music21 compatibility
midi_velocity = int(round(remap(f0_info[1], CdB.min(), CdB.max(), 0, 127)))
if f0 == None:
try:
note_info = Rest(type=mm.secondsToDuration(note_duration).type)
except DurationException:
note_info = None
f0 = 0
else:
midi_note = round(librosa.hz_to_midi(f0))
try:
note = Note(midi_note,
type=mm.secondsToDuration(note_duration).type)
note.volume.velocity = midi_velocity
note_info = [note]
except DurationException:
note_info = None
if note_info is None:
return None
# Generate Sinewave
n = np.arange(librosa.frames_to_samples(n_duration, hop_length=hop_length))
sine_wave = A * np.sin(2 * np.pi * f0 * n / float(sr))
return [sine_wave, note_info]
def notate_note(note):
if note['pitch'] == 'rest':
n = Rest()
else:
if isinstance(note['pitch'], list):
pitches = []
for pitch_number in note['pitch']:
p = Pitch(pitch_number)
# Force all flats
if p.accidental.name == 'sharp':
p = p.getEnharmonic()
pitches.append(p)
n = Chord(notes=pitches)
else:
p = Pitch(note['pitch'])
# Force all flats
if p.accidental.name == 'sharp':
p = p.getEnharmonic()
n = Note(p)
d = Duration()
if note['duration'] == 0:
d.quarterLength = .125
d = d.getGraceDuration()
else:
# music21 docs say `fill` is for testing. I can't remember why I chose
# to use it originally. It works. But not for tuplets. Maybe this blog
# post contains a better solution:
# http://music21-mit.blogspot.com/2015/09/durations-and-durationtuples.html
d.fill(note['durations'])
n.duration = d
return n
def generate(self, seq_len, a_par=0):
pattern = self.model_inp[self.start]
prediction_output = []
for note_index in range(seq_len):
prediction_input = pattern.reshape(1, seq_len, 2,
len(self.sorted_notes))
prediction_input = prediction_input / float(len(self.sorted_notes))
predictions = self.model.predict(prediction_input, verbose=0)[0]
for prediction in predictions:
index = np.argmax(prediction[0])
duration_i = np.argmax(prediction[1])
for name, value in self.sorted_notes.items():
if value == index:
result = name
break
else:
result = None
for name, value in self.sorted_durations.items():
if value == duration_i:
duration = name
break
else:
duration = None
prediction_output.append((result, Duration(duration)))
result = np.zeros_like(prediction)
result[0][index] = 1
result[1][duration_i] = 1
pattern = np.concatenate([pattern, [result]])
pattern = pattern[len(pattern) - seq_len:len(pattern)]
offset = 0
output_notes = []
for pattern, duration in prediction_output:
if pattern.isdigit() or ('.' in pattern):
notes_in_chord = pattern.split('.')
notes = []
for current_note in notes_in_chord:
new_note = Note(int(current_note))
new_note.duration = duration
new_note.storedInstrument = instrument.PanFlute()
notes.append(new_note)
new_chord = Chord(notes)
new_chord.offset = offset
output_notes.append(new_chord)
else:
new_note = Note(pattern)
new_note.offset = offset
new_note.storedInstrument = instrument.Flute()
output_notes.append(new_note)
offset += 0.6
midi_stream = stream.Stream(output_notes)
midi_stream.write('midi',
fp=f'my_music/{self.model.name}_{self.start}.mid')
def conditionalAdd(ts, n: note.Note) -> None:
'''
Add an element only if it is not already in the chord.
If it has more tie information than the previously
added note, then remove the previously added note and add it
'''
from music21 import stream
nonlocal pitchBust # love Py3!!!
p = n.pitch
pitchKey = p.nameWithOctave
pitchGroup = None
if addPartIdAsGroup:
partContext = n.getContextByClass(stream.Part)
if partContext is not None:
pidStr = str(partContext.id)
pitchGroup = pidStr.replace(
' ', '_') # spaces are not allowed as group names
n.pitch.groups.append(pitchGroup)
n.groups.append(pitchGroup)
if pitchKey not in seenPitches:
seenPitches.add(pitchKey)
notesToAdd[pitchKey] = newNote(ts, n)
return
elif not removeRedundantPitches:
notesToAdd[pitchKey + str(pitchBust)] = newNote(ts, n)
pitchBust += 1
return
elif addPartIdAsGroup and pitchGroup is not None:
notesToAdd[pitchKey].groups.append(pitchGroup)
notesToAdd[pitchKey].pitch.groups.append(pitchGroup)
if not addTies:
return
# else add derivation once multiple derivations are allowed.
oldNoteTie = notesToAdd[pitchKey].tie
if oldNoteTie is not None and oldNoteTie.type == 'continue':
return # previous note was as good or better
possibleNewNote = newNote(ts, n)
possibleNewNote.groups = notesToAdd[pitchKey].groups
if possibleNewNote.tie is None:
return # do nothing
elif oldNoteTie is None:
notesToAdd[pitchKey] = possibleNewNote # a better note to add
elif {oldNoteTie.type, possibleNewNote.tie.type} == startStopSet:
notesToAdd[pitchKey].tie.type = 'continue'
elif possibleNewNote.tie.type == 'continue':
notesToAdd[pitchKey] = possibleNewNote # a better note to add
elif possibleNewNote.tie.type == oldNoteTie.type:
return
else:
raise VerticalityException('Did I miss one? ',
possibleNewNote.tie, oldNoteTie)
def test_17():
top, bot = _setup_parts()
top.append(Note('G4', quarterLength=0.5))
top.append(Note('A4', quarterLength=0.75)) # 0.5
top.append(Note('F4', quarterLength=0.75)) # 1.25
top.append(Note('E4', quarterLength=0.5)) # 2.0
bot.append(Note('G3', quarterLength=0.5))
bot.append(Note('A3', quarterLength=0.25)) # 0.5
bot.append(Note('F3', quarterLength=0.375)) # 0.75
bot.append(Rest(quarterLength=0.25)) # 1.125
bot.append(Note('G3', quarterLength=0.625)) # 1.375
bot.append(Note('G3', quarterLength=0.5)) # 2.0
return Score([top, bot])
def PlayPiano(self, n):
if (n == 1):
p = Note("C----", type='whole')
elif (n == 2):
p = Note("D--", type='whole')
elif (n == 3):
p = Note("F--", type='whole')
elif (n == 4):
p = Note("G--", type='whole')
elif (n == 5):
p = Note("A--", type='whole')
elif (n == 6):
p = Note("B#4", type='whole')
elif (n == 7):
p = Note("B#6", type='whole')
PianoPart = stream.Part()
PianoPart.insert(0, instrument.Piano())
pianoMeasure = stream.Measure()
pianoMeasure.append(p)
PianoPart.append(pianoMeasure)
sp = midi.realtime.StreamPlayer(PianoPart)
sp.play()
def add_to_melody_sequence(new_melody_sequence, elem, bar_length):
if type(elem) not in [Note, Rest]:
pass
elif bar_length + elem.quarterLength >= time_signature:
extra = bar_length + elem.quarterLength - time_signature
elem.quarterLength = time_signature - bar_length
if elem.quarterLength > 0.0:
new_melody_sequence += [elem]
bar_length = extra
# The possible extra note
elem = Note(elem.nameWithOctave) if type(elem) is Note else Rest()
elem.quarterLength = extra
if elem.quarterLength > 0.0:
new_melody_sequence += [elem]
else:
new_melody_sequence += [elem]
bar_length += elem.quarterLength
return (new_melody_sequence, elem, bar_length)
def create_c_major_scale(self):
song = []
song.append(Note('C4', quarterLength=1.0))
song.append(Note('D4', quarterLength=1.0))
song.append(Note('E4', quarterLength=1.0))
song.append(Note('F4', quarterLength=1.0))
song.append(Note('G4', quarterLength=1.0))
song.append(Note('A4', quarterLength=1.0))
song.append(Note('B4', quarterLength=1.0))
song.append(Note('C5', quarterLength=1.0))
return song
def note_rhythm_zip(melody,
note_sequence,
rhythm_sequence,
time_signature,
interval=0.25):
melody_sequence = mimic_melody(note_sequence, melody)
melody_sequence = [
Note(elem.nameWithOctave, quarterLength=interval)
if type(elem) is Note else Rest(quarterLength=interval)
for elem in melody_sequence
for i in range(0, int(elem.quarterLength / interval))
]
new_melody_sequence = []
elem = None
bar_length = 0.0
# Handle notes in the melody due to bars and time signature
def add_to_melody_sequence(new_melody_sequence, elem, bar_length):
if type(elem) not in [Note, Rest]:
pass
elif bar_length + elem.quarterLength >= time_signature:
extra = bar_length + elem.quarterLength - time_signature
elem.quarterLength = time_signature - bar_length
if elem.quarterLength > 0.0:
new_melody_sequence += [elem]
bar_length = extra
# The possible extra note
elem = Note(elem.nameWithOctave) if type(elem) is Note else Rest()
elem.quarterLength = extra
if elem.quarterLength > 0.0:
new_melody_sequence += [elem]
else:
new_melody_sequence += [elem]
bar_length += elem.quarterLength
return (new_melody_sequence, elem, bar_length)
for index, rhythm in enumerate(rhythm_sequence):
if rhythm == 'Hold' and type(elem) is Note:
elem.quarterLength += interval
elif rhythm == 'Note':
new_melody_sequence, elem, bar_length = add_to_melody_sequence(
new_melody_sequence, elem, bar_length)
elem = melody_sequence[index]
elem.quarterLength = interval
elif rhythm == 'Rest' and type(elem) is Rest:
elem.quarterLength += interval
elif rhythm == 'Rest' or rhythm == 'Hold':
new_melody_sequence, elem, bar_length = add_to_melody_sequence(
new_melody_sequence, elem, bar_length)
elem = Rest()
elem.quarterLength = interval
new_melody_sequence, elem, bar_length = add_to_melody_sequence(
new_melody_sequence, elem, bar_length)
return new_melody_sequence
def searchForIntervals(notesStr):
'''notesStr is the same as above. Now however we check to see
if the generic intervals are the same, rather than the note names.
Useful if the clef is missing.
'''
notesArr = notesStr.split()
noteObjArr = []
for tN in notesArr:
tNObj = Note()
tNObj.name = tN[0]
tNObj.octave = int(tN[1])
noteObjArr.append(tNObj)
interObjArr = []
for i in range(len(noteObjArr) - 1):
int1 = interval.notesToInterval(noteObjArr[i], noteObjArr[i+1])
interObjArr.append(int1)
#print interObjArr
searcher1 = IntervalSearcher(interObjArr)
ballataObj = cadencebook.BallataSheet()
streamLily = ""
for thisWork in ballataObj:
for thisCadence in thisWork.snippets:
if (thisCadence is None):
continue
for i in range(len(thisCadence.parts)):
if searcher1.compareToStream(thisCadence.parts[i].flat) is True:
notesList = ""
for thisNote in thisCadence.parts[i].flat.notes:
notesList += thisNote.name + " "
#thisNote.editorial.color = "blue"
streamLily += "\\score {" + \
"<< \\time " + str(thisCadence.timeSig) + \
"\n \\new Staff {" + str(thisCadence.parts[i].lily) + "} >>" + \
str(thisCadence.header()) + "\n}\n"
print("In piece %r found in stream %d: %s" % (thisWork.title, i, notesList))
if streamLily:
print(streamLily)
lily.lilyString.LilyString(streamLily).showPDF()
def searchForNotes(notesStr):
'''the notesStr is a string of notes in the following form:
"C4 D4 E4 B3 C4"
that's it: name, octave. With no accidentals. If octave is 0 then
it means do not bother checking for octaves.
Currently octave is ignored anyhow.
'''
notesArr = notesStr.split()
noteObjArr = []
for tN in notesArr:
tNName = tN[0]
if tNName.lower() != "r":
tNObj = Note()
tNObj.name = tN[0]
tNObj.octave = int(tN[1])
else:
tNObj = Rest()
noteObjArr.append(tNObj)
ballataObj = cadencebook.BallataSheet()
searcher1 = NoteSearcher(noteObjArr)
streamLily = ""
for thisWork in ballataObj:
for thisCadence in thisWork.snippets:
if thisCadence is None:
continue
for i in range(len(thisCadence.parts)):
if searcher1.compareToStream(thisCadence.parts[i].flat) is True:
notesList = ""
for thisNote in thisCadence.parts[i].flat.notesAndRests:
#thisNote.editorial.color = "blue"
if hasattr(thisNote.lily, "value"):
notesList += thisNote.lily.value + " "
streamLily += "\\score {" + \
"<< \\time " + str(thisCadence.timeSig) + \
"\n \\new Staff {" + str(thisCadence.parts[i].lily) + "} >>" + \
thisCadence.header() + "\n}\n"
print("In piece %r found in stream %d: %s" % (thisWork.title, i, notesList))
if streamLily:
lS = lily.lilyString.LilyString(streamLily)
lS.showPNG()
def generate_notes_in_batch(note_params_df,
output_dir,
audio_format='flac',
sample_rate=44100):
"""
Generates a batch of single note samples from the given table of parameters.
`note_params_df` - a Pandas Dataframe with columns:
`midi_number, midi_instrument, volume, duration, tempo`. Their meaning is the same as in generate_single_note.
`output_dir` - output directory for the MIDI files
Each sample goes to a single MIDI file named by the numeric index. Also each synthesized audio sample goes to a
"""
os.makedirs(output_dir, exist_ok=True)
fs = FluidSynth(sample_rate=sample_rate)
stream = Stream()
for i, row in note_params_df.iterrows():
stream.append(MetronomeMark(number=row['tempo']))
stream.append(make_instrument(int(row['midi_instrument'])))
duration = row['duration']
stream.append(
chord_with_volume(
Chord([
Note(midi=int(row['midi_number']),
duration=Duration(duration))
]), row['volume']))
stream.append(Rest(duration=Duration(2 * duration)))
midi_file = '{0}/all_samples.midi'.format(output_dir)
audio_file_stereo = '{0}/all_samples_stereo.{1}'.format(
output_dir, audio_format)
audio_file = '{0}/all_samples.{1}'.format(output_dir, audio_format)
audio_index_file = '{0}/all_samples_index.csv'.format(output_dir)
# TODO: We currently assume some fixed duration and tempo (1.0, 120)!!!
# The parts should be split according to an index.
audio_index = make_audio_index(note_params_df, 3.0, 0.5, sample_rate)
audio_index.to_csv(audio_index_file)
write_midi(stream, midi_file)
fs.midi_to_audio(midi_file, audio_file_stereo)
convert_to_mono(audio_file_stereo, audio_file)
os.remove(audio_file_stereo)
x, sample_rate = sf.read(audio_file)
parts = split_audio_to_parts(x, sample_rate, audio_index)
store_parts_to_files(parts, sample_rate, output_dir, audio_format)
def next_note(self, notes):
"""
notes: Music21 Stream or list of ints/floats
returns: Musci21 Note
"""
note_numbers = notes if isinstance(notes[0], (int, float)) else list(
map(lambda note: note.pitch.ps,
notes.flat.getElementsByClass('Note')))
pattern = self.find_best_pattern(note_numbers)
print("Best pattern found is:", pattern)
note_number = self.next_note_from_pattern(note_numbers, pattern)
return Note(note_number)
def unifiedTest(self):
C4 = Note(); C4.name = "C"
D4 = Note(); D4.name = "D"
E4 = Note(); E4.name = "E"
F4 = Note(); F4.name = "F"
G4 = Note(); G4.name = "G"
A4 = Note(); A4.name = "A"
B4 = Note(); B4.name = "B"
C5 = Note(); C5.name = "C"; C5.octave = 5
D5 = Note(); D5.name = "D"; D5.octave = 5
a = VoiceLeadingQuartet(C4, D4, G4, A4)
assert a.similarMotion() == True
assert a.parallelMotion() == True
assert a.antiParallelMotion() == False
assert a.obliqueMotion() == False
assert a.parallelInterval(interval.stringToInterval("P5")) == True
assert a.parallelInterval(interval.stringToInterval("M3")) == False
b = VoiceLeadingQuartet(C4, C4, G4, G4)
assert b.noMotion() == True
assert b.parallelMotion() == False
assert b.antiParallelMotion() == False
assert b.obliqueMotion() == False
c = VoiceLeadingQuartet(C4, G4, C5, G4)
assert c.antiParallelMotion() == True
assert c.hiddenInterval(interval.stringToInterval("P5")) == False
d = VoiceLeadingQuartet(C4, D4, E4, A4)
assert d.hiddenInterval(Interval("P5")) == True
assert d.hiddenInterval(Interval("A4")) == False
assert d.hiddenInterval(Interval("AA4")) == False
def testGenerateFirstSpecies(self):
'''
A First Species Counterpoint Generator by Jackie Rogoff (MIT 2010) written as part of
an UROP (Undergraduate Research Opportunities Program) project at M.I.T. 2007.
'''
n101 = Note()
n101.duration.type = "quarter"
n101.name = "A"
aMinor = scale.ConcreteMinorScale(n101)
n101b = Note()
n101b.duration.type = "quarter"
n101b.name = "D"
dMinor = scale.ConcreteMinorScale(n101b)
counterpoint1 = ModalCounterpoint()
(n110, n111, n112, n113) = (Note(), Note(), Note(), Note())
(n114, n115, n116, n117, n118) = (Note(), Note(), Note(), Note(), Note())
(n119, n120, n121, n122, n123) = (Note(), Note(), Note(), Note(), Note())
(n124, n125, n126, n127, n128) = (Note(), Note(), Note(), Note(), Note())
n110.duration.type = "quarter"
n111.duration.type = "quarter"
n112.duration.type = "quarter"
n113.duration.type = "quarter"
n114.duration.type = "quarter"
n115.duration.type = "quarter"
n116.duration.type = "quarter"
n117.duration.type = "quarter"
n118.duration.type = "quarter"
n110.name = "A"
n110.octave = 3
n111.name = "C"
n111.octave = 4
n112.name = "B"
n112.octave = 3
n113.name = "C"
n113.octave = 4
n114.name = "D"
n115.name = "E"
n116.name = "C"
n116.octave = 4
n117.name = "B"
n117.octave = 3
n118.name = "A"
n118.octave = 3
n119.name = "F"
n120.name = "E"
n121.name = "D"
n122.name = "G"
n123.name = "F"
n124.name = "A"
n125.name = "G"
n126.name = "F"
n127.name = "E"
n128.name = "D"
cantusFirmus1 = Stream([n110, n111, n112, n113, n114, n115, n116, n117, n118])
cantusFirmus2 = Stream([n110, n115, n114, n119, n120, n113, n121, n116, n117, n118])
cantusFirmus3 = Stream([n114, n119, n115, n121, n122, n123, n124, n125, n126, n127, n128])
choices = [cantusFirmus1, cantusFirmus2, cantusFirmus3, cantusFirmus3, cantusFirmus3, cantusFirmus3]
cantusFirmus = random.choice(choices)
thisScale = aMinor
if cantusFirmus is cantusFirmus3:
thisScale = dMinor
goodHarmony = False
goodMelody = False
while (goodHarmony == False or goodMelody == False):
try:
hopeThisWorks = counterpoint1.generateFirstSpecies(cantusFirmus, thisScale)
print [note1.name + str(note1.octave) for note1 in hopeThisWorks.notes]
hopeThisWorks2 = counterpoint1.raiseLeadingTone(hopeThisWorks, thisScale)
print [note1.name + str(note1.octave) for note1 in hopeThisWorks2.notes]
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
