code: def _openResources(self):
          
          try:
              rate, data = scipy.io.wavfile.read(self._fileName, mmap=True)
          except Exception as ex:
              logger.warning(ex)
              logger.warning("Unable to read wav with memmory mapping. Trying without now.")
              rate, data = scipy.io.wavfile.read(self._fileName, mmap=False)
  
          self._array = data
          self.attributes['rate'] = rate
docs: Uses numpy.loadtxt to open the underlying file.