docstr: Run on stereo
docstr_tok: ["Run","on","stereo"]
code: def test_on_stereo(self):
      "Run on stereo"
      self.input_signal = np.random.randn(3 * 44100, 2)
  
      self.process_signal = self.input_signal.mean(axis=1)
      process_frames_eod = [
          (frames, eod)
          for frames, eod in get_frames(signal=self.process_signal)
      ]
      self.process_frames, process_eod = zip(*process_frames_eod)
  
imports: import unittest
  from unit_timeside import TestRunner
  from timeside.core.preprocessors import downmix_to_mono, frames_adapter
  import numpy
  from numpy.testing import assert_array_equal
label_desc: Use image node_id 3 for calling the TestDownmixToMono obj's underlying member method code with example usage: obj.test_on_stereo() without return types