Error in wfdb_to_wav

[dmerinodel]

Hi everyone,

this is my first time writing an issue as well as using wfdb so, excuse me in advance for the mistakes I'll surely make :)

I'm trying to obtain some .wav from the data stored in VOICED database with the following piece of code:

import wfdb.io.convert.wav
import os

path = 'my_path'
wfdb.io.convert.wav.wfdb_to_wav('voice001', pn_dir='voiced',
                                output_filename=os.path.join(path, 'aaab.wav'))

Thus, I obtain the following error:

Traceback (most recent call last): File "path_of_my_script", line 18, in wfdb.io.convert.wav.wfdb_to_wav('voice001', pn_dir='voiced', File "C:[...]\AppData\Local\Programs\Python\Python310\lib\site-packages\wfdb\io\convert\wav.py", line 121, in wfdb_to_wav np.left_shift(np.subtract(record.adc(), offset), shift) File "C:[...]\AppData\Local\Programs\Python\Python310\lib\site-packages\wfdb\io_signal.py", line 578, in adc nanlocs = np.isnan(self.p_signal) TypeError: ufunc 'isnan' not supported for the input types, and the inputs could not be safely coerced to any supported types according to the casting rule ''safe''

At first I thought that I was messing it up and went to the documentation page. I ended up realizing that if I try to run the example piece of code that appears for wfdb_to_wav:

wfdb_to_wav('100', pn_dir='pwave')

I obtain the same error as my code's. I did some research and some people has the same 'TypeError: ufunc 'isnan' not supported...' in other context, they managed to fix it using pandas instead of numpy, but it doesn't work for me. Any idea of why is this happening?

[bemoody]

This is a bug in wfdb_to_wav; it calls rdrecord with smooth_frames=False when what it wants is smooth_frames=True. Thanks for pointing this out! We ought to include a test case for wfdb_to_wav in the test suite.

Looks like this bug has been there since wfdb_to_wav (then called mit2wav) was first written, though prior to v4.0.0 the bug would only have occurred with multi-frequency input records.

[dmerinodel]

I tried with smooth_frames=True and my code runs, but the .wav that generates doesn't make any sound. I guess it's not that easy :) thanks!