code: def testMultiChannel(self):
      for ext in ["wav", "aiff", "flac"]:
          filename = join(
              testdata.audio_dir,
              "generated",
              "multichannel",
              "4channels." + ext,
          )
          self.assertRaises(
              RuntimeError, lambda: sAudioLoader(filename=filename)
          )
  
file_path: essentia/test/src/unittests/io/test_audioloader_streaming.py
imports: from essentia_test import *
  import essentia
  from essentia.streaming import AudioLoader
  import sys
label_desc: Use image node_id 8 for calling the TestAudioLoader_Streaming obj's underlying member method code with example usage: obj.testMultiChannel() without return types