docs: def _load_zip_wav(zfile, offset=0, count=None):
      """Load a wav file into an array from frame start to fram end
  
      :param zfile: ZipExtFile file-like object from where to load the audio
      :param offset: First sample to load
      :param count: Maximum number of samples to load
      :return: The audio samples in a numpy array of floats
      """
  
      buf = StringIO.StringIO(zfile.read())
  
      sample_rate, audio = wavfile.read(buf)
      audio = audio[offset:]
  
      if count:
          audio = audio[:count]
  
      return sample_rate, audio