code: def _generate_audio(self, **kwargs):
      size = [
          kwargs.get("k", self.audio_count),
          kwargs.get("n", self.num_samples),
          kwargs.get("c", self.num_channels),
      ]
      return np.sin(
          np.linspace(0.0, 100.0, np.prod(size), dtype=np.float32)
      ).reshape(size)
  
imports: import glob
  import os
  import numpy
  import tensorflow
  from tensorboard.compat import tf2
  from tensorboard.plugins.audio import metadata
  from tensorboard.plugins.audio import summary
  from tensorboard.util import tensor_util
label_desc: Use image node_id 2 for calling the SummaryBaseTest obj's underlying member method code with example usage: obj._generate_audio() and returns: np