class_docstr: Read audio sample from wav file, return sample data and sample rate.
docstr: Set params.
  :param config: contains three optional parameters:
        --sample_rate       : Waveform data sample frequency (must match the waveform
                              file, if specified there). (float, default = 16000)
        --speed             : Speed of sample channels wanted. (float, default=1.0)
        --audio_channels    :(int, default=1).
  :return: An object of class HParams, which is a set of hyperparameters as
          name-value pairs.
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code: def params(cls, config=None):
      """
      Set params.
      :param config: contains three optional parameters:
            --sample_rate       : Waveform data sample frequency (must match the waveform
                                  file, if specified there). (float, default = 16000)
            --speed             : Speed of sample channels wanted. (float, default=1.0)
            --audio_channels    :(int, default=1).
      :return: An object of class HParams, which is a set of hyperparameters as
              name-value pairs.
      """
      audio_channels = 1
      sample_rate = 16000
      speed = 1.0
  
      hparams = HParams(cls=cls)
      hparams.add_hparam("audio_channels", audio_channels)
      hparams.add_hparam("sample_rate", sample_rate)
      hparams.add_hparam("speed", speed)
  
      if config is not None:
          hparams.override_from_dict(config)
  
      return hparams
  
file_path: delta/delta/data/frontend/read_wav.py
imports: import delta.compat
  from delta.utils.hparam import HParams
  from delta.data.frontend.base_frontend import BaseFrontend
  from core.ops import py_x_ops
label_desc: Use image node_id 2 for calling the ReadWav obj's underlying member method code with example usage: obj.params(cls, config) and returns: hparams