code: def convert16k(inputfile, outputfile16k, stereo=False):
      if not stereo:
          command = "sox {} -c 1 -b 16 -t wav {} rate 16k".format(
              inputfile, outputfile16k
          )
      else:
          command = "sox {} -b 16 -t wav {} rate 16k".format(
              inputfile, outputfile16k
          )
      subprocess.call(shlex.split(command))
  
file_path: textlesslib/examples/expresso/dataset/processing/convert_to_16k.py
imports: import os
  import shlex
  import subprocess
  from tqdm import tqdm
  from time import time
  from pathlib import Path
label_desc: Use image node_id 2 for calling a global function with example usage: convert16k(inputfile, outputfile16k, stereo) without return types