def generate_midi(generator, output_file, start_sequence): # 加载模型参数 generator.load_weights('weights.hdf5') # 计算音符和和弦的数量 notes = load_midi(start_sequence) pitchnames = sorted(set(notes)) n_vocab = len(set(notes)) # 准备输入序列 sequence_length = 100 note_to_int = dict((note, number) for number, note in enumerate(pitchnames)) network_input = [] for i in range(0, len(notes) - sequence_length, 1): sequence_in = notes[i:i + sequence_length] network_input.append([note_to_int[char] for char in sequence_in]) # 生成 MIDI 文件 start = np.random.randint(0, len(network_input)-1) int_to_note = dict((number, note) for number, note in enumerate(pitchnames)) pattern = network_input[start] prediction_output = [] for note_index in range(500): prediction_input = np.reshape(pattern, (1, len(pattern), 1)) prediction_input = prediction_input / float(n_vocab) prediction = generator.predict(prediction_input, verbose=0) index = np.argmax(prediction) result = int_to_note[index] prediction_output.append(result) pattern.append(index) pattern = pattern[1:len(pattern)] offset = 0 output_notes = [] # 创建音符和和弦对象 for pattern in prediction_output: # 如果是和弦 if ('.' in pattern) or pattern.isdigit(): notes_in_chord = pattern.split('.') notes = [] for current_note in notes_in_chord: new_note = note.Note(int(current_note)) new_note.storedInstrument = instrument.Piano() notes.append(new_note) new_chord = chord.Chord(notes) new_chord.offset = offset output_notes.append(new_chord) # 如果是音符 else: new_note = note.Note(pattern) new_note.offset = offset new_note.storedInstrument = instrument.Piano() output_notes.append(new_note) # 增加偏移量 offset += 0.5 # 创建 MIDI 流对象 midi_stream = stream.Stream(output_notes) # 保存 MIDI 文件 midi_stream.write('midi', fp=output_file)
时间: 2024-02-14 21:11:12 浏览: 83
这段代码是用来生成 MIDI 音乐的,其中使用了一个生成器模型来生成音乐。在生成 MIDI 音乐之前,先加载模型参数,并准备输入序列。接下来,从输入序列中随机选择一个起始点,然后使用生成器模型来预测下一个音符或和弦。生成的音符或和弦会被添加到预测输出列表中,同时也会更新当前输入序列,以便用于下一个预测。最后,将预测输出转换成音符和和弦对象,并将它们添加到 MIDI 流对象中,最终生成 MIDI 文件。
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