Shell script para o comprimido

Este é o shell script para o comprimido


NAME=noise
CONT=1
for AR in 11025 16000 22050 32000
do
   let CONT=1
   for AB in 8 16 32 64 128 192 256 320
   do
      ffmpeg -i ${NAME}.wav -acodec libmp3lame -ar ${AR} -ab ${AB}k ${NAME}${AR}-${CONT}.mp3
      ffmpeg -i ${NAME}${AR}-${CONT}.mp3 -acodec flac -ar 96000 -ab ${AB} ${NAME}${AR}-${CONT}.wav
      rm ${NAME}${AR}-${CONT}.mp3
      let CONT=${CONT}+1;
   done
done