import speech_recognition as sr

r = sr.Recognizer()
with sr.Microphone(device_index=2) as source:
    print("Скажите что-нибудь ...")
    audio = r.listen(source)

query = r.recognize_google(audio, Language="ru-RU")
print("Вы сказали: " + query.lower())

ошибка:
Traceback (most recent call last):
  File "C:\Users\User\Desktop\jarvis.py", line 4, in <module>
    with sr.Microphone(device_index=3) as source:
  File "C:\Users\User\AppData\Roaming\Python\Python39\site-packages\speech_recognition\__init__.py", line 138, in __enter__
    self.audio.open(
  File "C:\Users\User\AppData\Roaming\Python\Python39\site-packages\pyaudio.py", line 750, in open
    stream = Stream(self, *args, **kwargs)
  File "C:\Users\User\AppData\Roaming\Python\Python39\site-packages\pyaudio.py", line 441, in __init__
    self._stream = pa.open(**arguments)
OSError: [Errno -9998] Invalid number of channels