code: def testMp3(self):
      self.encoderTest(
          "audiowritertest.mp3", bitrate=320, precision=2e-4
      )
  
file_path: essentia/test/src/unittests/io/test_audiowriter_streaming.py
imports: from essentia_test import *
  from essentia.streaming import AudioWriter, AudioLoader
  from essentia.streaming import MonoMixer
  import os
label_desc: Use image node_id 7 for calling the TestAudioWriter_Streaming obj's underlying member method code with example usage: obj.testMp3() without return types