pyaudio出现Invalid number of channels的解决方法

最近准备做个录制电脑本身的音频，于是用到了pyaudio。代码如下。

import pyaudio

def get_audio_devices():
    p = pyaudio.PyAudio()
    device_info = p.get_host_api_info_by_index(0)
    device_count = device_info.get('deviceCount')

    devices = []
    for i in range(device_count):
        device = p.get_device_info_by_host_api_device_index(0, i)
        devices.append(device)

    p.terminate()
    return devices

def open_audio_stream(device_index):
    p = pyaudio.PyAudio()

    stream = p.open(format=pyaudio.paInt16, channels=2, rate=48000, input=True, input_device_index=device_index,frames_per_buffer=1024)

    return p, stream

def read_audio_data(stream, chunk_size=1024):
    data = stream.read(chunk_size)
    return data

def close_audio_stream(p, stream):
    stream.stop_stream()
    stream.close()
    p.terminate()

# 获取音频设备
devices = get_audio_devices()
print("可用的音频设备：")
for i, devices in enumerate(devices):
    print(devices)
open_audio_stream(1)

结果报错：OSError: [Errno -9998] Invalid number of channels。

通道错误，打印音频设备时，发现maxInputChannels这个值为0。

解决办法：

需要在电脑声音设置中，录制中的立体声混音开启。