window需要安装FFmpeg
参考:
https://blog.youkuaiyun.com/csdn_yudong/article/details/129182648
from pydub import AudioSegment
fp= r"C:\Users\19406\Desktop\75968.mp3" #输入自己的文件地址
output = AudioSegment.from_mp3(fp).set_channels(1) #1为单声道 2为多声道
output.export(r"C:\Users\19406\Desktop\75968.wav", format='wav')