OSError: [Errno -9996] Invalid input device (no default output device)

[chong5u]

(voice_llm) D:\ai\voice_llm>python app.py
pygame 2.5.2 (SDL 2.28.3, Python 3.11.9)
Hello from the pygame community. https://www.pygame.org/contribute.html
Knowledgebase created successfully!
Traceback (most recent call last):
File "D:\ai\voice_llm\app.py", line 98, in
main()
File "D:\ai\voice_llm\app.py", line 62, in main
stream = audio.open(format=pyaudio.paInt16, channels=1, rate=16000, input=True, frames_per_buffer=1024)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Users\admin\miniconda3\envs\voice_llm\Lib\site-packages\pyaudio_init_.py", line 639, in open
stream = PyAudio.Stream(self, *args, **kwargs)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Users\admin\miniconda3\envs\voice_llm\Lib\site-packages\pyaudio_init_.py", line 441, in init
self._stream = pa.open(**arguments)
^^^^^^^^^^^^^^^^^^^^
OSError: [Errno -9996] Invalid input device (no default output device)