text: import click
  
  from lhotse.bin.modes import obtain, prepare
  from lhotse.recipes.musan import download_musan, prepare_musan
  from lhotse.utils import Pathlike
  
  __all__ = ['musan']
  
  
  @prepare.command()
  @click.argument('corpus_dir', type=click.Path(exists=True, dir_okay=True))
  @click.argument('output_dir', type=click.Path())
  @click.option('--use-vocals/--no-vocals', default=True, help='Whether to include vocal music in "music" part.')
  def musan(
          corpus_dir: Pathlike,
          output_dir: Pathlike,
          use_vocals: bool
  ):
      """MUSAN data preparation."""
      prepare_musan(corpus_dir, output_dir=output_dir, use_vocals=use_vocals)
  
  
  @obtain.command()
  @click.argument('target_dir', type=click.Path())
  def musan(
          target_dir: Pathlike
  ):
      """MUSAN download."""
      download_musan(target_dir)
  