class_docstr: more tests to cover all branches 
class_docstr_tok: ["more","tests","to","cover","all","branches"]
code: def test_hztomel_htk_wrong_values(self):
      with self.assertRaises(TypeError):
          hztomel_htk("0")
  
imports: from unittest import main
  from numpy.testing import TestCase
  from numpy.testing import assert_equal, assert_almost_equal
  from _tools import assert_warns
  from utils import is32bit
  import numpy
  import aubio
  from aubio import hztomel, meltohz
  from aubio import hztomel_htk, meltohz_htk
label_desc: Use image node_id 5 for calling the aubio_hztomel_wrong_values obj's underlying member method code with example usage: obj.test_hztomel_htk_wrong_values() without return types