code: def test_get_silence(self):
      assert_equal(self.o.get_silence(), AUBIO_DEFAULT_NOTES_SILENCE)
  
imports: from numpy.testing import TestCase, assert_equal, assert_almost_equal
  from aubio import notes, source
  import numpy
  from utils import list_all_sounds
label_desc: Use image node_id 4 for calling the aubio_notes_params obj's underlying member method code with example usage: obj.test_get_silence() without return types