aurio.sh

#!/bin/bash
oldUsage=0
while true
do
  usage=`ps -e -o %cpu | awk '{s+=$1} END {print int(s)}'`
  echo " Usage=" $usage
  if [ "$usage" -gt 99 ];
  then
    usage=99
  elif [ "$usage" -gt 70 ];
  then
    usage=50
  else
    usage=10
  fi
  echo " outputlevel=" $usage
  if [ "$oldUsage" != "$usage" ];
  then
    pidold=$pid
    oldUsage=$usage
    afplay rainforest.mp3 -v 0."$usage" &
    sleep 1
    pid=`echo $!`
    if [ ! -z "$pidold" ];
    then
      echo "killing pid=" $pidold
      kill $pidold
    fi
  fi
  sleep 3
done