librosa: librosa.load (audioread) breaks on this audio file, not sure why?

Calling librosa.load('101729.wav', sr=None) (download file here) gives the following error:

---------------------------------------------------------------------------
error                                     Traceback (most recent call last)
<ipython-input-172-5d71d5777356> in <module>()
----> 1 audio, sr = librosa.load('101729.wav', sr=None)

/Users/justin/dev/miniconda3/envs/py27/lib/python2.7/site-packages/librosa/core/audio.pyc in load(path, sr, mono, offset, duration, dtype)
    121         n = 0
    122 
--> 123         for frame in input_file:
    124             frame = util.buf_to_float(frame, dtype=dtype)
    125             n_prev = n

/Users/justin/dev/miniconda3/envs/py27/lib/python2.7/site-packages/audioread/rawread.pyc in read_data(self, block_samples)
    110 
    111             # Make sure we have the desired bitdepth and endianness.
--> 112             data = audioop.lin2lin(data, old_width, TARGET_WIDTH)
    113             if self._needs_byteswap and self._file.getcomptype() != 'sowt':
    114                 # Big-endian data. Swap endianness.

error: Size should be 1, 2 or 4

Must be something about the file’s format that causes the problem, though I’m not sure what. Here’s the file info (as returned by pysox):

{'bitrate': 24,
 'channels': 2,
 'duration': 84.580021,
 'encoding': 'Signed Integer PCM',
 'num_samples': 4059841,
 'sample_rate': 48000.0,
 'silent': False}