usage: soundoutput
       Display current sound output device

   or: soundoutput <device-index>
       Set sound output device

   or: soundoutput [-l|--list] [-h|--help] [-v|--version]

Options
    -l, --list  List all sound output devices
    -h, --help  Display this help

Documentation can be found at https://github.com/neethouse/soundoutput#readme