code: def test_output_shape_is_correct(self):
      synthesizer = synths.FilteredNoise(n_samples=16000)
      filter_bank_magnitudes = (
          tf.zeros((3, 16000, 100), dtype=tf.float32) + 3.0
      )
      output = synthesizer(filter_bank_magnitudes)
  
      self.assertAllEqual([3, 16000], output.shape.as_list())
  
file_path: ddsp/ddsp/synths_test.py
imports: from ddsp import core
  from ddsp import synths
  import numpy
  import tensorflow.compat.v2
label_desc: Use image node_id 1 for calling the FilteredNoiseTest obj's underlying member method code with example usage: obj.test_output_shape_is_correct() without return types