Python语音识别提供以下输出

Question

当我在pycharm virtualenv，ubuntu18.04中运行此python代码

def listen():
    recognizer = speech_recognition.Recognizer()
    with speech_recognition.Microphone(device_index=0) as source:
        audio = recognizer.listen(source)
        message = ""
        try:
            message = recognizer.recognize_google(audio)
            print("You said: " + message)
        except speech_recognition.UnknownValueError:
            print("Google Speech Recognition could not understand audio")
        except speech_recognition.RequestError as error:
            print("Cannot send request to google".format(error))
        return message
say("Hi " + getpass.getuser() + " what can i do for you?")
data = listen()

我收到类似输出的错误：

  

ALSA lib pcm_dmix.c：1052：（snd_pcm_dmix_open）无法打开从属       ALSA lib pcm.c：2495：（snd_pcm_open_noupdate）未知PCM卡.pcm.rear       ALSA lib pcm.c：2495：（snd_pcm_open_noupdate）未知PCM       cards.pcm.center_lfe       ALSA lib pcm.c：2495：（snd_pcm_open_noupdate）未知PCM卡.pcm.side       ALSA lib pcm_route.c：867：（find_matching_chmap）未找到匹配项       频道地图       ALSA lib pcm_dmix.c：1052：（snd_pcm_dmix_open）无法打开从站

如何解决？ 这令人困惑，这表明ALSA。