code: def _load_datasamples(self, num_samples):
      from datasets import load_dataset
  
      ds = load_dataset(
          "hf-internal-testing/librispeech_asr_dummy",
          "clean",
          split="validation",
      )
      speech_samples = ds.sort("id").select(range(num_samples))[
          :num_samples
      ]["audio"]
      return [x["array"] for x in speech_samples]
  
imports: import unittest
  import numpy
  import pytest
  from transformers.audio_utils import amplitude_to_db, hertz_to_mel, mel_filter_bank, mel_to_hertz, power_to_db, spectrogram, window_function
label_desc: Use image node_id 9 for calling the AudioUtilsFunctionTester obj's underlying member method code with example usage: obj._load_datasamples(num_samples) and returns: unknown