docstr: Load an audio file and return PCM along with the sample rate
docstr_tok: ["Load","an","audio","file","and","return","PCM","along","with","the","sample","rate"]
code: def read_audio(self, fname):
      """Load an audio file and return PCM along with the sample rate"""
      wav, sr = sf.read(fname)
      assert sr == 16e3
  
      return wav
  
imports: import argparse
  import gc
  import os
  import os.path
  import random
  import numpy
  import tqdm
  import torch
  from collections import namedtuple
  import faiss
  import fairseq
  import soundfile
label_desc: Use image node_id 2 for calling the Wav2VecFeatureReader obj's underlying member method code with example usage: obj.read_audio(fname) and returns: wav