def test_g(self):
for x in range(10):
# create midi object
mid = MidiFile()
track = MidiTrack(instrument=Piano.ElectricPiano1)
mid.tracks.append(track)
# get random tab and append to midi track
tab = generator.get_random_tab(tempo=70)
filename = "%s" % str(x)
track.append(tab)
# save files
mid.save(join(self.mid_path, filename + ".mid"))
array = tab.to_array()
np.save(join(self.npy_path, filename + ".npy"), array)
output.midi2wav(join(self.mid_path, filename + ".mid"),
join(self.wav_path, filename + ".wav"))
json = tab.to_json()
output.json(join(self.json_path, filename + ".json"), json)
def test_key_shift(self):
for x in range(1):
tracks = [
MidiTrack(channel=0, instrument=Piano.AcousticGrandPiano),
MidiTrack(channel=1, instrument=Guitar.ElectricGuitar_jazz),
MidiTrack(channel=2, instrument=Strings.Cello),
MidiTrack(channel=3, instrument=Brass.Trumpet),
MidiTrack(channel=4, instrument=Organ.ChurchOrgan),
MidiTrack(channel=5, instrument=Guitar.AcousticGuitar_steel),
MidiTrack(channel=6, instrument=SynthLead.Lead2_sawtooth),
MidiTrack(channel=7, instrument=Guitar.OverdrivenGuitar)
]
tracks_ = [tracks[i] for i in [1, 2, 3]]
for track in tracks_:
track.append(generator.get_random_tab(tempo=70))
combo = ["123"]
mid_ = MidiFile()
mid_.tracks.extend(tracks_)
mid_.set_tick_per_beat(50)
for indices in combo:
mid = MidiFile()
mid.set_tick_per_beat(50, resample=False)
for index in indices:
mid.tracks.append(tracks_[int(index) - 1])
# TODO : fix 1+2+3 bug
# TODO : resample bug
# TODO : only piano bug
event_nb = []
for key_shift in range(3):
mid.key_shift(1)
print(len(mid.get_events()[0]))
event_nb.append(len(mid.get_events()[0]))
if event_nb[0] != event_nb[1]:
raise ValueError
from mimi import MidiFile, MidiTrack, generator
for x in range(100):
tracks = [MidiTrack(channel=x, instrument=(x + 1) * 8) for x in range(3)]
for track in tracks:
track.append_bar(generator.get_random_tab(tempo=70))
mid = MidiFile()
mid.tracks.extend(tracks)
# mid.draw_roll()
mid.save_mp3("data/mp3/%03d.mp3" % x)
mid.save_npz("data/npz/%03d.npz" % x)
# mid.play()
from mimi import generator import matplotlib.pyplot as plt # get random tab and append to midi track tab = generator.get_random_tab(tempo=70) array = tab.to_array() print(array.shape) # piano roll plt.imshow(array[:, :, 0]) # onset event plt.imshow(array[:, :, 1])
* channel最多只有16個，track不限
* 你可以有複數個track放在同一個channel #但不建議
* 建議一個channel就配一個track
* 建議一個channel只配一種樂器，配兩種會有bug
#
"""
# 創造兩個track，放在不同channel，使用不同樂器
tracks = [
MidiTrack(channel=0, instrument=Piano.AcousticGrandPiano),
MidiTrack(channel=1, instrument=Strings.Cello)
]
# 對每個track生成隨機音符/和弦
for track in tracks:
track.append(generator.get_random_tab(tempo=70, key="C"))
# 把tracks放到MidiFile物件中
mid = MidiFile()
mid.tracks.extend(tracks)
# 對mid物件進行存檔/播放等操作
mid.draw_roll() # 用matplot作圖
mid.play() # 用播放器放出聲音, windows和mac預設是用timidity, ubuntu是用ffplay
# roll = mid.get_roll() # np.array of pinao roll in 16 channel in shape [channel, pitch, time]
# mid.save_npz("test.npz") # npz中有兩個array, instrument是標記每個channel用啥樂器, 另外一個是pinao roll(draw_roll畫出來的array)
# mid.save_png("test.png") # piano roll的圖
# mid.save_mp3("test.mp3") # 這個應該不用解釋