timeout 3s cat /dev/urandom > /dev/dsp

   dd if=/dev/urandom bs=176400 count=3 | play -t raw -r 44100 -e signed-integer -b 16 -c 2 -\

    #!/usr/bin/env bash
    F_NUM=$(($RANDOM % $(ls ~/.git/sounds/$i| wc -l)))
    n=0
    for i in *
      do
       if [[ n -eq $F_NUM ]]
         then
           afplay ~/.git/sounds/$i > /dev/null 2>&1 &
       fi
       n=$((n + 1))
    done

#!/bin/bash

  SOUNDPATH=${HOME}/.play-random/sounds

  if [ ! -d ${SOUNDPATH} ]; then
      echo "Create and populate '${SOUNDPATH}' directory"
      exit 1;
  fi

  SOUNDS=($(ls "${SOUNDPATH}"))
  NUM_SOUNDS=${#SOUNDS[*]}

  if [ ${NUM_SOUNDS} -eq 0 ]; then
      echo "No sound files found in '${SOUNDPATH}' directory"
      exit 1;
  fi

  # select which sound to play
  SOUND="${SOUNDPATH}/${SOUNDS[$((RANDOM%NUM_SOUNDS))]}"
  echo ${SOUND}

  /usr/bin/aplay ${SOUND}

There's a way of removing that ls ${DIR} and use an echo ${DIR}/* at the expense of making it a bit uglier to detect when there's no sound files.

  #!/bin/sh

  SOUND=$(ls ~/Sounds |sort -R |tail -1)
  afplay ~/Sounds/$SOUND > /dev/null 2>&1 &