Space Station Lambda

#!/bin/sh
#
# from http://osdir.com/ml/audio.ecasound.general/2005-08/msg00002.html
#
# description: removes silence from the beginning and the end
#              of a file
# version: 20050807-1
# usage: ecatrimsilence.sh <inputfile>
 
tmp=ecatrimsilence-tmp.wav
 
if test -e "$tmp" ; then
  echo "error: temp file $tmp exists, unable to continue..."
  exit 1
fi
 
if test ! -e "$1" ; then
  echo "error: input file $1 does not exist, unable to continue..."
  exit 2
fi
 
format=`ecalength -sf "$1"`
 
echo "Trimming file ${1}."
echo "Removing silence at the end..."
ecasound -q -f:${format} -i reverse,"${1}" -o "${tmp}" -ge:1,0,0 -b:256
rm -f "${1}"
echo "Removing silence at the beginning..."
ecasound -q -f:${format} -i reverse,"${tmp}" -o "${1}" -ge:1,0,0 -b:256
rm -f "${tmp}"
echo "Done."
</inputfile>