Move off use of pydub, to support Python 3.13?

[FranklinChen]

➜  ~ python3.12 -c "import audioop; print('audioop is available')"
<string>:1: DeprecationWarning: 'audioop' is deprecated and slated for removal in Python 3.13
audioop is available
➜  ~ python3.13 -c "import audioop; print('audioop is available')"
Traceback (most recent call last):
  File "<string>", line 1, in <module>
    import audioop; print('audioop is available')
    ^^^^^^^^^^^^^^
ModuleNotFoundError: No module named 'audioop'

See jiaaro/pydub#815

https://github.com/jiaaro/pydub has not been updated in 3 years jiaaro/pydub#827 . Maybe it's time to move off using it, and finding an alternative library? Either that or use one of the workaround discusses in the pydub issues.