使用声音设备录制声音时出错

问：

我想使用声音设备来捕获（录制？）从我的扬声器中传出的音频。我的扬声器有两个通道。

这是我的代码（我在这里找到 https://realpython.com/playing-and-recording-sound-python/#python-sounddevice_1）：

import sounddevice as sd
from scipy.io.wavfile import write

fs = 44100/2  # Sample rate
seconds = 3  # Duration of recording

myrecording = sd.rec(int(seconds * fs), samplerate=fs, channels=2)
sd.wait()  # Wait until recording is finished
write('output.wav', fs, myrecording)  # Save as WAV file

我收到以下错误：

Traceback (most recent call last):
  File "main.py", line 24, in <module>
    myrecording = sd.rec(int(seconds * fs), samplerate=fs, channels=2)
  File "/usr/local/lib/python3.7/site-packages/sounddevice.py", line 277, in rec
    ctx.input_dtype, callback, blocking, **kwargs)
  File "/usr/local/lib/python3.7/site-packages/sounddevice.py", line 2587, in start_stream
    **kwargs)
  File "/usr/local/lib/python3.7/site-packages/sounddevice.py", line 1422, in __init__
    **_remove_self(locals()))
  File "/usr/local/lib/python3.7/site-packages/sounddevice.py", line 901, in __init__
    f'Error opening {self.__class__.__name__}')
  File "/usr/local/lib/python3.7/site-packages/sounddevice.py", line 2747, in _check
    raise PortAudioError(errormsg, err)
sounddevice.PortAudioError: Error opening InputStream: Invalid number of channels [PaErrorCode -9998]

我在运行 rosetta 模拟 python 的 Mac M1 上。

当我将通道设置为“1”时，它可以工作，但它只能从一个通道录制。

我试图通过运行来获取扬声器的索引，这是输出：print(sd.query_devices())

> 0 MacBook Pro Microphone, Core Audio (1 in, 0 out)
< 1 MacBook Pro Speakers, Core Audio (0 in, 2 out)
  2 Microsoft Teams Audio, Core Audio (2 in, 2 out)

所以我尝试手动设置这个索引，如下所示：

myrecording = sd.rec(int(seconds * fs), samplerate=fs, channels=2, device=1)

但这也产生了同样的错误。