@property
    def executor(self):
        cls = self.__class__
        if cls._executor is None:
            cls._executor = ThreadPoolExecutor(20)
        return cls._executor
Get current audio device type. Device type describes something like
dataset/ETHPy150Open everware/everware/everware/spawner.py/CustomDockerSpawner.executor--crossover with--dataset/ETHPy150Open disqus/playa/playa/lib/vlc.py/libvlc_audio_output_get_device_type