@classmethod
def setUpClass(cls):
    env_config_path = os.path.abspath(os.path.join(os.path.dirname(__file__), '..', '..', '..', '.env'))
    load_dotenv(env_config_path)
    cls.sample_wav_file = os.path.join(os.environ.get('TEST_DIR'), 'res', 'audio', 'Yamaha-V50-Rock-Beat-120bpm.wav')
@classmethod
def setUpClass(cls):
    env_config_path = os.path.abspath(os.path.join(os.path.dirname(__file__), '..', '..', '..', '.env'))
    load_dotenv(env_config_path)
    cls.sample_wav_file = os.path.join(os.environ.get('TEST_DIR'), 'res', 'audio', 'Yamaha-V50-Rock-Beat-120bpm.wav')