code: def test_find_audio_period(mono_wave, stereo_wave, wave_type):
      if wave_type == "mono":
          wave1 = mono_wave(freq=400)
          wave2 = mono_wave(freq=100)
      else:
          wave1 = stereo_wave(left_freq=400, right_freq=220)
          wave2 = stereo_wave(left_freq=100, right_freq=200)
      clip = CompositeAudioClip(
          [
              AudioClip(make_frame=wave1, duration=0.3, fps=22050),
              multiply_volume(
                  AudioClip(make_frame=wave2, duration=0.3, fps=22050),
                  0,
                  end_time=0.1,
              ),
          ]
      )
      loop_clip = loop(clip, 4)
      assert round(find_audio_period(loop_clip), 6) == pytest.approx(
          0.29932, 0.1
      )
  
imports: import importlib
  import math
  import os
  import shutil
  import sys
  import numpy
  import pytest
  from moviepy.audio.AudioClip import AudioClip, CompositeAudioClip
  from moviepy.audio.fx.multiply_volume import multiply_volume
  from moviepy.audio.tools.cuts import find_audio_period
  from moviepy.video.compositing.concatenate import concatenate_videoclips
  from moviepy.video.fx.loop import loop
  from moviepy.video.fx.time_mirror import time_mirror
  from moviepy.video.io.VideoFileClip import VideoFileClip
  from moviepy.video.tools.credits import CreditsClip
  from moviepy.video.tools.cuts import FramesMatch, FramesMatches, detect_scenes, find_video_period
  from moviepy.video.tools.drawing import circle, color_gradient, color_split
  from moviepy.video.tools.interpolators import Interpolator, Trajectory
  from moviepy.video.VideoClip import BitmapClip, ColorClip, ImageClip, VideoClip
label_desc: Use image node_id 20 for calling a global function with example usage: test_find_audio_period(mono_wave, stereo_wave, wave_type) without return types