librosa.load does not work with pathlib.Path

Describe the bug

# OK:
>>> librosa.load(str(Path("...")))
# Not OK:
>>> librosa.load(Path("..."))
Traceback (most recent call last):
...
  File ".../soundfile.py", line 1263, in _open
    raise TypeError("Invalid file: {0!r}".format(self.name))
TypeError: Invalid file: PosixPath('...')
>>> soundfile.__version__
'0.9.0'
>>> librosa.__version__
'0.8.0'

Software versions

python: 3.8.5 (default, Jul 21 2020, 10:48:26) [Clang 11.0.3 (clang-1103.0.32.62)]

librosa: 0.8.0

audioread: 2.1.8 numpy: 1.18.5 scipy: 1.4.1 sklearn: 0.22.2.post1 joblib: 0.16.0 decorator: 4.4.2 soundfile: 0.9.0 resampy: 0.2.2 numba: 0.50.1

numpydoc: None sphinx: None sphinx_rtd_theme: None sphinxcontrib.versioning: None sphinx-gallery: None pytest: 6.0.1 pytest-mpl: None pytest-cov: None matplotlib: 3.3.0 presets: None

[jonashaag]

😮 I did pip install -U soundfile before reporting this issue, and pip reported v0.10.2 to be installed, but soundfile.__version__ still gave 0.9.0. Not sure what was going on there. Still, the librosa dependency is still at 0.9.0 so should be updated.

[bmcfee]

The problem is that we didn’t update the minimum soundfile version necessary for this to work. If you upgrade soundfile to >=0.10.2, Path works as expected.

We should revise the requirements spec accordingly, but there are no code changes necessary to address this.