code: def test_hpss_multi(y_multi):
      y, sr = y_multi
  
      # compare each channel
      CH0, CP0 = librosa.effects.hpss(y[0])
      CH1, CP1 = librosa.effects.hpss(y[1])
      CHall, CPall = librosa.effects.hpss(y)
  
      # Check each channel
      assert np.allclose(CH0, CHall[0])
      assert np.allclose(CP0, CPall[0])
      assert np.allclose(CH1, CHall[1])
      assert np.allclose(CP1, CPall[1])
  
      # Verify that they're not all the same
      assert not np.allclose(CHall[0], CHall[1])
      assert not np.allclose(CPall[0], CPall[1])
  
imports: import warnings
  import os
  from contextlib import nullcontext
  import numpy
  import pytest
  import librosa
label_desc: Use image node_id 10 for calling a global function with example usage: test_hpss_multi(y_multi) without return types