code: def test_remix_mono(align_zeros):
      # without zc alignment
      y = np.asarray([1, 1, -1, -1, 2, 2, -1, -1, 1, 1], dtype=float)
      y_t = np.asarray([-1, -1, -1, -1, 1, 1, 1, 1, 2, 2], dtype=float)
      intervals = np.asarray([[2, 4], [6, 8], [0, 2], [8, 10], [4, 6]])
  
      y_out = librosa.effects.remix(
          y, intervals, align_zeros=align_zeros
      )
      assert np.allclose(y_out, y_t)
  
imports: import warnings
  import os
  from contextlib import nullcontext
  import numpy
  import pytest
  import librosa
label_desc: Use image node_id 7 for calling a global function with example usage: test_remix_mono(align_zeros) without return types