code: def testRegression(self):
      audio = MonoLoader(
          filename=join(
              testdata.audio_dir, "recorded", "mozart_c_major_30sec.wav"
          )
      )()
      result = Chromaprinter()(audio)
  
      self.assertEqualVector(self.expected, result)
  
file_path: essentia/test/src/unittests/highlevel/test_chromaprinter.py
imports: from essentia_test import *
  import essentia.streaming
label_desc: Use image node_id 2 for calling the TestChromaprinter obj's underlying member method code with example usage: obj.testRegression() without return types