code: def testMp348000(self):
      # files with 9 impulses in each channel
      filename = join(mp3_dir, "impulses_1second_48000_st.mp3")
      left = self.load(filename, "left", 48000)
      right = self.load(filename, "right", 48000)
      mix = self.load(filename, "mix", 48000)
      self.assertEqual(self.sum(left), 9)
      self.assertEqual(self.sum(right), 9)
      self.assertEqual(self.sum(mix), 9)
  
imports: from essentia_test import *
  from numpy import fabs
label_desc: Use image node_id 12 for calling the TestMonoLoader obj's underlying member method code with example usage: obj.testMp348000() without return types