为什么要找这个目录‘voice_type’，这个目录是不存在的

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speaker_to_voice_type_path = os.path.join(folder, 'speaker_to_voice_type.json')
if os.path.exists(speaker_to_voice_type_path):
with open(speaker_to_voice_type_path, 'r', encoding='utf-8') as f:
speaker_to_voice_type = json.load(f)
return speaker_to_voice_type

speaker_to_voice_type = {}
speaker_folder = os.path.join(folder, 'SPEAKER')
voice_types = {}
if not os.path.exists('voice_type'):
    get_available_speakers()
for file in os.listdir('voice_type'):
    voice_type = file.replace('.wav', '')
    voice_types[voice_type] = np.load(f'voice_type/{file.replace(".wav", ".npy")}')
    
for file in os.listdir(speaker_folder):
    if not file.endswith('.wav'):
        continue
    speaker = file.replace('.wav', '')
    wav_path = os.path.join(speaker_folder, file)
    embedding = generate_embedding(wav_path)
    # find the 
    np.save(wav_path.replace('.wav', '.npy'), embedding)
    speaker_to_voice_type[speaker] = sorted(voice_types.keys(), key=lambda x: 1 - cosine(voice_types[x], embedding))[0]