code: def setUp(self):
      super().setUp()
      self.samples_rate = 44100
      self.audio_count = 1
      self.num_samples = 20
      self.num_channels = 2
  
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 1 for calling the SummaryBaseTest obj's underlying member method code with example usage: obj.setUp() without return types