def key_name_to_notes(key, octave_start=1, number_of_octaves=4):
""" Convert a key name to notes, using C3=60
:param key: String matching one of the values in pre-defined KEY dict
:param octave_start: octave for the first note, as defined by C3=60
:param number_of_octaves: The number of octaves to include in the list
:return:
"""
key = KEYS.get(key)
if not key:
raise ValueError('No key by that name found')
notes = []
octave = octave_start + 1
while len(notes) < number_of_octaves * 7:
for note in key:
note_with_octave = note + str(octave)
note_number = note_name_to_number(note_with_octave)
if note_number % 12 == 0 and len(notes) != 0:
octave += 1
note_with_octave = note + str(octave)
note_number = note_name_to_number(note_with_octave)
notes.append(note_number)
return notes
def note_with_rhythm_pattern(self, rhythm, c=['C5', 'D5']):
'''
A music clip note with rhythm
'''
t = 0
c_len = len(c)
for r in rhythm:
note_number = pretty_midi.note_name_to_number(c[t])
note = pretty_midi.Note(
velocity=20, pitch=note_number, start=r[0], end=r[1])
self.pm.instruments[0].notes.append(note)
note_number = pretty_midi.note_name_to_number(c[t + 1])
note = pretty_midi.Note(
velocity=30, pitch=note_number, start=r[0], end=r[1])
self.pm.instruments[0].notes.append(note)
note_number = pretty_midi.note_name_to_number(c[t + 2])
note = pretty_midi.Note(
velocity=20, pitch=note_number, start=r[0], end=r[1])
self.pm.instruments[0].notes.append(note)
if (t + 6) >= c_len:
break
t += 3
def __init__(self,
midi_folder_path,
longest_sequence_length=None,
lowest_note="C3",
highest_note="C7"):
self.lowest_note_num = pretty_midi.note_name_to_number(lowest_note)
self.highest_note_num = pretty_midi.note_name_to_number(highest_note)
self.num_notes = self.highest_note_num - self.lowest_note_num
self.midi_folder_path = midi_folder_path
# TODO(gizatt) Make this recursive within the training
# folder for better organization.
midi_filenames = os.listdir(midi_folder_path)
self.longest_sequence_length = longest_sequence_length
midi_full_filenames = map(
lambda filename: os.path.join(midi_folder_path, filename),
midi_filenames)
self.midi_full_filenames = list(midi_full_filenames)
# Preload all data. We'll never have *that* much.
def load_piano_roll(filename):
print("Loading %s" % filename)
piano_roll, tempos = midi_filename_to_piano_roll(filename)
# Cut down to the selected note range
return piano_roll[self.lowest_note_num:self.highest_note_num, :]
self.piano_rolls = [
load_piano_roll(filename) for filename in self.midi_full_filenames
]
if longest_sequence_length is None:
self.longest_sequence_length = max(roll.shape[1]
for roll in self.piano_rolls)
def rando_midi(filename):
# Create a PrettyMIDI object
cello_c_chord = pretty_midi.PrettyMIDI()
# Create an Instrument instance for a cello instrument
cello_program = pretty_midi.instrument_name_to_program('Cello')
cello = pretty_midi.Instrument(program=cello_program)
# Iterate over note names, which will be converted to note number later
for note_name in ['F4', 'A5', 'C5']:
# Retrieve the MIDI note number for this note name
note_number = pretty_midi.note_name_to_number(note_name)
# Create a Note instance for this note, starting at 0s and ending at .5s
note = pretty_midi.Note(velocity=100, pitch=note_number, start=0, end=2)
# Add it to our cello instrument
cello.notes.append(note)
for note_name in ['C5', 'E5', 'G5']:
# Retrieve the MIDI note number for this note name
note_number = pretty_midi.note_name_to_number(note_name)
# Create a Note instance for this note, starting at 0s and ending at .5s
note = pretty_midi.Note(velocity=100, pitch=note_number, start=2, end=4)
# Add it to our cello instrument
cello.notes.append(note)
# Add the cello instrument to the PrettyMIDI object
cello_c_chord.instruments.append(cello)
# Write out the MIDI data
cello_c_chord.write(filename)
def make_midi(dict_note, pred_argmax, x_num, y_num, TEMPO, NUMERATOR,
DENOMINATOR, path_output_melody_chords_midi):
def calc_notetime(tempo, numerator, denominator):
notetime = [0] * 10
j = 64
for i in range(9):
notetime[i + 1] = 60 * numerator * (1 / j) / tempo
j /= 2
return notetime
# 音を鳴らす間隔(nt[5]は4分音符)
nt = calc_notetime(TEMPO, NUMERATOR, DENOMINATOR)
pm = pretty_midi.PrettyMIDI(resolution=960, initial_tempo=TEMPO)
instrument = pretty_midi.Instrument(
program=89, is_drum=False) # 89:synth pad(fantasia)
# melody
time = 0
for i in range(x_num):
for j in range(y_num):
note_name = dict_note[str(i) + str(j)][0]
note_number = pretty_midi.note_name_to_number(note_name)
d_time = nt[int(math.log2(64 * dict_note[str(i) + str(j)][1]))]
# if dict_note[str(i)+str(j)][1] =0.5,
# d_time = nt[5]
note = pretty_midi.Note(velocity=100,
pitch=note_number,
start=time,
end=time + d_time)
instrument.notes.append(note)
time = time + d_time
# chords
time = 0
for chord_num in pred_argmax[0]:
note_names = chords_li[chord_num]
d_time = nt[7] # 全音符
for note_name in note_names:
note_number = pretty_midi.note_name_to_number(note_name)
note = pretty_midi.Note(velocity=100,
pitch=note_number,
start=time,
end=time + d_time)
instrument.notes.append(note)
time = time + d_time
pm.instruments.append(instrument)
pm.write(path_output_melody_chords_midi)
print('')
print('FInish generating MIDI file (melody+chord) .')
def handy_functions():
#note or instrument names to numbers
pretty_midi.note_name_to_number('C4')
pretty_midi.instrument_name_to_program('Cello')
# shift pitches of notes
for instrument in midi_data.instruments:
if not instrument.is_drum:
for note in instrument.notes:
note.pitch += 5
def gen_music():
#gen music here
#file_save("music")
model = torch.load(MODEL_PATH)
model.eval()
model.to(device)
notes = []
note = comboNote1.get()
noteNo = str(pretty_midi.note_name_to_number(note))
notes.append(ntoi[noteNo])
note = comboNote2.get()
noteNo = str(pretty_midi.note_name_to_number(note))
notes.append(ntoi[noteNo])
note = comboNote3.get()
noteNo = str(pretty_midi.note_name_to_number(note))
notes.append(ntoi[noteNo])
note = comboNote4.get()
noteNo = str(pretty_midi.note_name_to_number(note))
notes.append(ntoi[noteNo])
note = comboNote5.get()
noteNo = str(pretty_midi.note_name_to_number(note))
notes.append(ntoi[noteNo])
generate = generate_from_one_note(notes)
for i in range(195):
output = torch.exp(model(torch.tensor([generate]).to(device)))
newarr = [i[0] for i in output[0]]
if tobeam.get():
beam = {}
for j in range(3):
c = Categorical(torch.tensor(newarr))
next_note = c.sample()
beam[next_note.item()] = newarr[next_note.item()]
for k in beam:
arr = copy.deepcopy(generate)
arr.pop(0)
arr.append(k)
instance_out = torch.exp(model(torch.tensor([arr]).to(device)))
instarr = [i[0] for i in instance_out[0]]
c = Categorical(torch.tensor(instarr))
next_note = c.sample()
beam[k] = beam[k] * instarr[next_note.item()]
generate.pop(0)
generate.append(max(beam.items(), key=operator.itemgetter(1))[0])
else:
c = Categorical(torch.tensor(newarr))
next_note = c.sample()
generate.pop(0)
generate.append(next_note.item())
return generate
def gen_music():
# gen music here
# file_save("music")
model = torch.load(MODEL_PATH, map_location=device)
model.eval()
model.to(device)
notes = []
note = starting_notes[0]
noteNo = str(pretty_midi.note_name_to_number(note))
notes.append(ntoi[f'({noteNo},)'])
note = starting_notes[1]
noteNo = str(pretty_midi.note_name_to_number(note))
notes.append(ntoi[f'({noteNo},)'])
note = starting_notes[2]
noteNo = str(pretty_midi.note_name_to_number(note))
notes.append(ntoi[f'({noteNo},)'])
note = starting_notes[3]
noteNo = str(pretty_midi.note_name_to_number(note))
notes.append(ntoi[f'({noteNo},)'])
note = starting_notes[4]
noteNo = str(pretty_midi.note_name_to_number(note))
notes.append(ntoi[f'({noteNo},)'])
generate = generate_from_one_note(notes)
for i in tqdm.tqdm(range(song_len-5)):
output = torch.exp(model(torch.tensor([generate]).to(device)))
newarr = [i[0] for i in output[0]]
if do_beam:
beam = {}
for j in range(3):
c = Categorical(torch.tensor(newarr))
next_note = c.sample()
beam[next_note.item()] = newarr[next_note.item()]
for k in beam:
arr = copy.deepcopy(generate)
arr.pop(0)
arr.append(k)
instance_out = torch.exp(model(torch.tensor([arr]).to(device)))
instarr = [i[0] for i in instance_out[0]]
c = Categorical(torch.tensor(instarr))
next_note = c.sample()
beam[k] = beam[k]*instarr[next_note.item()]
generate.pop(0)
generate.append(max(beam.items(), key=operator.itemgetter(1))[0])
else:
c = Categorical(torch.tensor(newarr))
next_note = c.sample()
generate.pop(0)
generate.append(next_note.item())
return generate
def get_midi_data(userNoteName, start, end):
print('Time for', userNoteName, 'got:', time.time())
if len(userNoteName) == 3:
userNoteName = userNoteName[0] + '#' + userNoteName[2]
primer = pretty_midi.PrettyMIDI()
instrument = pretty_midi.Instrument(
program=pretty_midi.instrument_name_to_program('Cello'))
noteNumber = pretty_midi.note_name_to_number(userNoteName)
try:
note = pretty_midi.Note(velocity=100,
pitch=noteNumber,
start=int(start),
end=int(start) + int(end))
except ValueError:
return []
instrument.notes.append(note)
primer.instruments.append(instrument)
output = generate_midi(primer, total_seconds=2) # Takes about 4-6 seconds
aiNotes = []
try:
note = output.instruments[0].notes[0]
notePitch, noteStart, noteEnd = pretty_midi.note_number_to_name(
note.pitch), note.start, note.end
if len(notePitch) == 3:
notePitch = notePitch[0] + 's' + notePitch[2]
aiNotes.append((notePitch, noteStart, noteEnd))
print('AI notes are', aiNotes)
return aiNotes
except IndexError:
return []
def add_notes(self, note_list, instrument_num=0, interval=.5):
'''
add notes to instrum √
support Note ,Pretty_Note,String
'''
if len(self.pm.instruments) - 1 < instrument_num:
pass
if note_list:
curr_time = self.pm.instruments[instrument_num].current_time
if isinstance(note_list[0], basestring):
for note_name in note_list:
# Retrieve the MIDI note number for this note name
note_number = pretty_midi.note_name_to_number(note_name)
# Create a Note instance for this note,
# starting at 0s and ending at .5s ,velocity random in 45 - 70
note = pretty_midi.Note(
velocity=random.randint(45, 70), pitch=note_number,
start=curr_time, end=curr_time + interval)
self.pm.instruments[instrument_num].notes.append(note)
curr_time += interval
elif isinstance(note_list[0], Note) or isinstance(note_list[0], P_NODE):
for note in note_list:
self.pm.instruments[instrument_num].notes.append(note)
else:
raise Exception(
'[-] Got a type : %s wrong note type ,except Note or String ' % type(note_list[0]))
self.pm.instruments[instrument_num].current_time = curr_time
def get_scale(note_name, scale):
note_number = pretty_midi.note_name_to_number(note_name)
list_notes = [note_number]
for mode in scale:
list_notes.append(note_number + mode)
print(list_notes)
return list_notes
def song(string, my_name): # 'bpm120 C4 8 C3 A4 8 A4 8' # the number by itself is the length of the note before it. If no number for a note, then quarter note by default
notes = string.split(' ')
velocity = 100
music = pretty_midi.PrettyMIDI()
cello_program = pretty_midi.instrument_name_to_program('Cello')
cello = pretty_midi.Instrument(program=cello_program)
bpm = int(notes[0][3:])
i = 1
start = 0.0
while i < len(notes):
cur_note = notes[i]
pitch_num = pretty_midi.note_name_to_number(cur_note)
if i < len(notes) - 1 and notes[i+1].isdigit(): #check if next item is tempo, or just next note
note_len = int(notes[i+1])
i += 2
else:
note_len = 4 # default is quarter note
i += 1
note_len = 1.0 / note_len # quarter note (4) is actually 1/4
end = start + get_note_length(bpm, note_len)
new_note = pretty_midi.Note(velocity, pitch_num, start, end)
cello.notes.append(new_note)
start = end
music.instruments.append(cello)
update_wav(music, my_name)
x = cello.notes
def test_4():
print("[%s:%d] test_4()" % \
(os.path.basename(libs.thisfile()), libs.linenum()
), file=sys.stderr)
# Create a PrettyMIDI object
cello_c_chord = pretty_midi.PrettyMIDI()
# Create an Instrument instance for a cello instrument
cello_program = pretty_midi.instrument_name_to_program('Cello')
cello = pretty_midi.Instrument(program=cello_program)
# Iterate over note names, which will be converted to note number later
for note_name in ['C5', 'E5', 'G5']:
# Retrieve the MIDI note number for this note name
note_number = pretty_midi.note_name_to_number(note_name)
# Create a Note instance for this note, starting at 0s and ending at .5s
note = pretty_midi.Note(velocity=100,
pitch=note_number,
start=0,
end=.5)
# Add it to our cello instrument
cello.notes.append(note)
# Add the cello instrument to the PrettyMIDI object
cello_c_chord.instruments.append(cello)
# Write out the MIDI data
cello_c_chord.write('cello-C-chord.mid')
def to_notes(self, scale: int) -> List[pretty_midi.Note]:
notes = []
beat_length_list_list = [
self._bar_to_beat_length_list(score_object_list)
for score_object_list in self.score_object_lists
]
beat_length_list = self._merge_beat_length_list(beat_length_list_list)
bpm_multiplexer = 60 / self.bpm
current_position = 0
for beat_length in beat_length_list:
if isinstance(beat_length.kind, Chord):
for note in beat_length.kind.to_notes(scale):
note_number = pretty_midi.note_name_to_number(note)
note = pretty_midi.Note(
velocity=100,
pitch=note_number,
start=current_position + random.random() * 0.03,
end=current_position +
beat_length.length * bpm_multiplexer,
)
notes.append(note)
current_position += beat_length.length * bpm_multiplexer
if (current_position * 44100 * 16 * 2 / 8 >
8388608 * 5): # あとでmp3に変換するようにしたのでかなりゆるくした
raise ChordiumException("長すぎます！")
return notes
def makeNote(note, startTime, endTime):
note_number = pretty_midi.note_name_to_number(note)
note = pretty_midi.Note(velocity=100,
pitch=note_number,
start=startTime,
end=endTime)
return note
def __init__(self, piano_midi, key, sequence_length=16, binarize=True):
self.sequence_length = sequence_length
if key:
## get the key of the music (by estimating the dominant semitone)
#total_velocity = sum(sum(piano_midi.get_chroma()))
#semitones = [sum(semitone)/total_velocity for semitone in piano_midi.get_chroma()]
#midi_key = np.argmax(semitones)
## Shift all notes down by midi_key semitones if major, midi_key + 3 semitones if minor
##transpose_key = midi_key if semitones[(midi_key + 4) % 12] > semitones[(midi_key + 3) % 12] else midi_key + 3
#transpose_key = 0 #TODO: temporarly disabled transposition of pitches
transpose_key = pretty_midi.note_name_to_number(key.tonic.name.replace('-','b')+'0') - 12 + (0 if key.mode=="major" else 3)
# Shift all notes down by transpose_key semitones
for instrument in piano_midi.instruments:
for note in instrument.notes:
note.pitch -= transpose_key if note.pitch - transpose_key >= 0 else transpose_key - 12
# this is the required sampling frequency to get 16 x 16th notes in a bar (1 bar = 4 beats)
fs = (piano_midi.estimate_tempo() * 16.0) / (4.0 * 60.0)
self.piano_roll = piano_midi.get_piano_roll(fs=fs)[21:109, :]
self.piano_roll = self.piano_roll.astype(np.float32)
# binarize if set
if binarize:
self.piano_roll = np.clip(self.piano_roll, 0, 1)
self.piano_roll = np.transpose(self.piano_roll)
def gen_midi(melodies, tempo):
music_gen = pretty_midi.PrettyMIDI()
piano_program = pretty_midi.instrument_name_to_program(
"acoustic grand piano")
piano = pretty_midi.Instrument(program=piano_program)
for melody in melodies:
runtime = 0
for n in melody:
# Retrieve the MIDI note number for this note name
note_number = pretty_midi.note_name_to_number(n[0])
length = (60 / tempo) * n[1]
# Create a Note instance, starting at 0s and ending at .5s
note = pretty_midi.Note(velocity=100,
pitch=note_number,
start=runtime,
end=runtime + length)
# Add it to our piano instrument
piano.notes.append(note)
#string_ens.notes.append(note)
runtime += length
# Add the instrument to the PrettyMIDI object
music_gen.instruments.append(piano)
#music_gen.instruments.append(string_ens)
# Write out the MIDI data
music_gen.write('generated_melody_primer.mid')
def make_random_song(file,
lmb_start=50,
lmb_stop=1,
seed=0,
tempo=120,
res=960,
len_t=1000):
'''
ポアソン過程でランダムな曲を作って、midiファイルに出力します。
file <str> :出力midiファイル名
lmb_start <float or list/array_of_float(len==128)> : note off から次の note on までの平均秒数
lmb_stop <float or list/array_of_float(len==128)> : note on から note off までの平均秒数
seed <int> : np.random.seedに渡す乱数の種
tempo <int> : テンポ
res <int> : レゾリューション
len_t <float> : 生成される曲の秒数（の上限）
'''
np.random.seed(seed)
pm = pretty_midi.PrettyMIDI(resolution=res,
initial_tempo=tempo) #pretty_midiオブジェクトを作ります
instrument = pretty_midi.Instrument(0) #instrumentはトラックに相当します。
if (isinstance(lmb_start, int) or isinstance(lmb_start, float)):
lmb_start = [lmb_start for i in range(128)]
if (isinstance(lmb_stop, int) or isinstance(lmb_stop, float)):
lmb_stop = [lmb_stop for i in range(128)]
low_pitch = pretty_midi.note_name_to_number('A0')
high_pitch = pretty_midi.note_name_to_number('A8')
for note_number in range(low_pitch, high_pitch):
t = 0.
while t <= len_t:
start = np.random.exponential(lmb_start[note_number]) + t
stop = np.random.exponential(lmb_stop[note_number]) + start
t = stop
if t > len_t:
break
note = pretty_midi.Note(
velocity=np.random.randint(50, 127),
pitch=note_number,
start=start,
end=stop) #noteはNoteOnEventとNoteOffEventに相当します。
instrument.notes.append(note)
pm.instruments.append(instrument)
pm.write(file) #midiファイルを書き込みます。
def chords2midi(chords_dict, file_name):
# pretty midiオブジェクトを作る
piano_chord = pretty_midi.PrettyMIDI()
# 楽器名を入れると、対応するgeneral midi program numberを返す
piano_program = pretty_midi.instrument_name_to_program('Acoustic Grand Piano')
# Instrument instanceをcelloとして作成
piano = pretty_midi.Instrument(program=piano_program)
# 解析したコードを単音のリストにバラす
for i, chord in enumerate(chords_dict["chords_result"]["chords"]):
logger.info(i, chord)
# Nの時はスキップ（ノートに書き込まない）
if chord['chord'] == "N":
continue
chords_list = key2chord(chord)
logger.info("chords list: {}".format(chords_list))
logger.info("start time: {}".format(chord["time"]))
logger.info("end time: {}".format(chords_dict["chords_result"]["chords"][i+1]["time"]-0.1))
# print("time: {}".format(float(chords_dict["chords_result"]["chords"][i+1]["time"])-float(chord["time"])))
for note_name in chords_list:
# コードの名前を数字に変換
note_number = pretty_midi.note_name_to_number(note_name)
logger.info("chord name {0}, chord num {1}".format(note_name, note_number))
# velocityを定義する
try:
note = pretty_midi.Note(
velocity=100,
pitch=note_number,
start=chord["time"],
end=chords_dict["chords_result"]
["chords"][i+1]["time"]-0.1
)
# print(note)
# 上記で作成したnoteをchelloインスタンスに加える
piano.notes.append(note)
except IndexError: # 最後の章は0.5秒とする
logger.info("note last code")
note = pretty_midi.Note(
velocity=100,
pitch=note_number,
start=chord["time"],
end=chord["time"]+0.5
)
# 上記で作成したnoteをchelloインスタンスに加える
piano.notes.append(note)
# PrettyMIDIオブジェクトに加える
piano_chord.instruments.append(piano)
print(piano)
print(piano_chord)
midi_file = "midi/" + str(file_name) + ".mid"
# MIDIファイルとして書き出す
piano_chord.write(midi_file)
# Load MIDI file into PrettyMIDI object
midi_data = pretty_midi.PrettyMIDI(midi_file)
# Print an empirical estimate of its global tempo
print(midi_data.estimate_tempo())
def getMelody(gpv_df):
"""
概要: GPVデータのデータフレームから、各変数の変化を表現する音声ファイルを作成する
@param gpv_df: 対象値に最も近いメッシュ上のGPVデータのdataframe
@return GPVデータから作成したmidiファイル
"""
#pretty_midiオブジェクトの作成
pm = pretty_midi.PrettyMIDI(resolution=960, initial_tempo=120)
# 各変数に楽器を割り当て、奏でる音階を値の変化から決定する
for n in range(0, len(gpv_df.index), 1):
# 楽器の割り当て、listは楽器の種別が重ならない様にするための工夫です
instrument_list = [x * 5 for x in range(0, 11, 1)]
instrument = pretty_midi.Instrument(instrument_list[n])
# 最小値0,最大値1にMin-Max Normalization
gpv_df_norm = gpv_df.apply(lambda x: ((x - x.min()) /
(x.max() - x.min())),
axis=1)
for t in range(0, len(gpv_df), 1):
tmp = gpv_df_norm.iloc[n, t]
if 0 <= tmp and tmp <= 1 / 8:
note_number = pretty_midi.note_name_to_number('C4')
elif 1 / 8 < tmp and tmp <= 2 / 8:
note_number = pretty_midi.note_name_to_number('D4')
elif 2 / 8 < tmp and tmp <= 3 / 8:
note_number = pretty_midi.note_name_to_number('E4')
elif 3 / 8 < tmp and tmp <= 4 / 8:
note_number = pretty_midi.note_name_to_number('F4')
elif 4 / 8 < tmp and tmp <= 5 / 8:
note_number = pretty_midi.note_name_to_number('G4')
elif 5 / 8 < tmp and tmp <= 6 / 8:
note_number = pretty_midi.note_name_to_number('A4')
elif 6 / 8 < tmp and tmp <= 7 / 8:
note_number = pretty_midi.note_name_to_number('B4')
elif 7 / 8 < tmp and tmp <= 1:
note_number = pretty_midi.note_name_to_number('C5')
else:
# 全ての値が0の場合適当な音を（正規化の段階でNanとなるため）
note_number = pretty_midi.note_name_to_number('C5')
note = pretty_midi.Note(velocity=100,
pitch=note_number,
start=t,
end=t + 1)
instrument.notes.append(note)
pm.instruments.append(instrument)
pm.write('output/midi/test.mid') #midiファイルを書き込みます。
return gpv_df_norm
def to_protobuf(self):
"""Protocol Buffer output."""
# TODO(ryanstauffer): Confirm that we need this
note = music_pb2.NoteSequence.Note()
note.pitch = pretty_midi.note_name_to_number(self.name)
note.denominator = self.length
return note
def convert_notes():
# Iterate over note names, which will be converted to note number later
note_list = []
for note_name in read_notes():
# Retrieve the MIDI note number for this note name
note_number = pretty_midi.note_name_to_number(note_name)
note_list.append(note_number)
return note_list
def add_chord_to_instrument(chord, start_position, length, instrument):
for note_name in chord:
note_number = pretty_midi.note_name_to_number(note_name)
note = pretty_midi.Note(velocity=100,
pitch=note_number,
start=start_position,
end=(start_position + length))
instrument.notes.append(note)
def add_tone_to_instrument(tone, start_position, length, instrument):
note_number = pretty_midi.note_name_to_number(tone)
print([tone, note_number])
note = pretty_midi.Note(velocity=100,
pitch=note_number,
start=start_position,
end=(start_position + length))
instrument.notes.append(note)
def create_midi_from_piece(piece: Piece,
midi_path: str,
measure_in_seconds: float,
instruments: List[int],
velocity: int,
opening_silence_in_seconds: float = 1.0,
trailing_silence_in_seconds: float = 1.0) -> None:
"""
Create MIDI file from a piece created by this package.
:param piece:
musical piece
:param midi_path:
path where resulting MIDI file is going to be saved
:param measure_in_seconds:
duration of one measure in seconds
:param instruments:
IDs of instruments (according to General MIDI specification)
that play corresponding melodic lines
:param velocity:
one common velocity for all notes
:param opening_silence_in_seconds:
number of seconds with silence to add at the start of the composition
:param trailing_silence_in_seconds:
number of seconds with silence to add at the end of the composition
:return:
None
"""
numeration_shift = pretty_midi.note_name_to_number('A0')
pretty_midi_instruments = []
for melodic_line, instrument in zip(piece.melodic_lines, instruments):
pretty_midi_instrument = pretty_midi.Instrument(program=instrument)
for element in melodic_line:
start_time = element.start_time * measure_in_seconds
start_time += opening_silence_in_seconds
end_time = start_time + element.duration * measure_in_seconds
pitch = element.position_in_semitones + numeration_shift
note = pretty_midi.Note(start=start_time,
end=end_time,
pitch=pitch,
velocity=velocity)
pretty_midi_instrument.notes.append(note)
pretty_midi_instrument.notes.sort(key=lambda x: (x.start, x.pitch))
pretty_midi_instruments.append(pretty_midi_instrument)
trailing_silence_start = piece.n_measures * measure_in_seconds
trailing_silence_start += opening_silence_in_seconds
note = pretty_midi.Note(
velocity=0,
pitch=1, # Arbitrary value that affects nothing.
start=trailing_silence_start,
end=trailing_silence_start + trailing_silence_in_seconds)
pretty_midi_instruments[0].notes.append(note)
composition = pretty_midi.PrettyMIDI()
for pretty_midi_instrument in pretty_midi_instruments:
composition.instruments.append(pretty_midi_instrument)
composition.write(midi_path)
def get_midi_data(userNoteName, start, end):
# Just generate one for now
primer = pretty_midi.PrettyMIDI()
instrument = pretty_midi.Instrument(program=pretty_midi.instrument_name_to_program('Cello'))
noteNumber = pretty_midi.note_name_to_number(userNoteName)
note = pretty_midi.Note(velocity=100, pitch=noteNumber, start=start, end=end)
instrument.notes.append(note)
output = generate_midi(primer, total_seconds=2)
pianoRoll = output.get_piano_roll()
subArrays = np.split(pianoRoll, [48, 81])
first = subArrays[1]
second = np.split(subArrays[2], [12, 15])[1]
ofInterest = np.concatenate((first, second))
listOfInterest = ofInterest.tolist()
# for subList in listOfInterest:
numZeros = 0
others = 0
aiNotes = []
for noteIndex, timeList in enumerate(pianoRoll.tolist()):
startTime = None
endTime = None
lastVal = 0
for timeIndex, value in enumerate(timeList):
timeIndex = timeIndex * 10
if value != 0:
# This note is on at timeIndex
if lastVal == 0:
# First timeIndex for this note
startTime = timeIndex
elif lastVal != 0:
# Note was on and is now off. Add to list of notes
endTime = timeIndex
noteName = pianoRollToNoteName.get(noteIndex)
if noteName is None:
pass
#print('Ignoring note at midi value', noteIndex)
else:
aiNotes.append((noteName, startTime, endTime))
#print('added note', noteName, 'with start and end', startTime, endTime)
startTime = None
endTime = None
# if item != 0 and item != 0.0:
# print('in sublist', noteIndex, 'at index', index, 'means note is', pianoRollToNoteName.get(noteIndex))
lastVal = value
if lastVal != 0:
endTime = timeIndex
noteName = pianoRollToNoteName.get(noteIndex)
if noteName is None:
pass
#print('Ignoring note at midi value', noteIndex)
else:
aiNotes.append((noteName, startTime, endTime))
#print('added note', noteName, 'with start and end', startTime, endTime)
startTime = None
endTime = None
return sorted(aiNotes, key=lambda x:x[1])
def seq_to_midi_rhythm(self, rhythm, c=['C5', 'D5']):
for note_name, _rhythm in zip(c, rhythm):
# Retrieve the MIDI note number for this note name
note_number = pretty_midi.note_name_to_number(note_name)
# Create a Note instance for this note, starting at 0s and ending at .5s
note = pretty_midi.Note(
velocity=66, pitch=note_number, start=_rhythm[0], end=_rhythm[1])
self.pm.instruments[0].notes.append(note)
def change_to_inner_tone(chord, tone): most_near = [100, "x"] num = [-12, 12, 0] for c in chord: for n in num: c_num = pretty_midi.note_name_to_number(c)+n if abs(c_num-tone)<=(most_near[0]): most_near = [abs(c_num-tone), c_num] return most_near[1]
def decode_note_notation(note_string):
'''Turn a string note into a list of its attributes'''
note = re.search('i(.*):v(.*):(.*):s(.*):e(.*)', note_string)
instrument = int(note.group(1))
velocity = int(note.group(2))
pitch = pretty_midi.note_name_to_number(note.group(3))
start = float(note.group(4))
end = float(note.group(5))
return [instrument, velocity, pitch, start, end]
def set_accompaniment(self):
accompaniment = [
'', 'A3', 'A3', 'F#4', 'F#4', 'G4', 'G4', 'F#4', 'F#4', 'E4', 'E4',
'D4', 'D4', 'A3', 'C#4', 'D4', 'D4'
]
self.accompaniment = [
{pretty_midi.note_name_to_number(note)} if note != '' else ''
for note in accompaniment
]
#!/usr/local/bin/python
import sys
import pretty_midi
midi_data = pretty_midi.PrettyMIDI('drums.mid')
pr = midi_data.instruments[0].get_piano_roll().tolist()
pr_len = len(pr[0])
new_pr = []
print pr_len
for i in range(0,pr_len):
tmp_pr = []
for j in range(0,127):
if pr[j][i] > 0:
if midi_data.instruments[0].is_drum:
tmp_pr.append(pretty_midi.note_number_to_drum_name(j))
else:
tmp_pr.append(pretty_midi.note_number_to_name(j))
new_pr.append(tmp_pr)
print new_pr
# Synthesize the resulting MIDI data using sine waves
#audio_data = midi_data.synthesize()
print pretty_midi.note_name_to_number("C3")