BASH 4 script to convert m4a files into mp3 files

m4a2mp3.bash

#!/usr/local/bin/bash
# Error handling
set -o nounset
set -o errexit
set -o pipefail

# BASH 4 script to convert m4a files into mp3 files
# Needed programs : faad and lame
OIFS="$IFS"
IFS=$'\n'

for FILE in $(find . -maxdepth 1 -type f -name '*.m4a')
do
    # Fill array with all the values of this file
    # This took me some time to discover 
    # http://stackoverflow.com/questions/7612320/bash-weird-variable-scope-when-populating-array-with-results
    # Create associative array
    declare -A MYMAP
    while IFS=$OIFS read KEY VALUE; do
        # remove colon from key
        KEY=$(echo "$KEY"|sed 's/://')
        # Add key and value to associative array
        MYMAP[$KEY]=$VALUE
    done < <(faad -i "${FILE}" 2>&1 | grep ': ' | grep -v '^ ')
    # Use info to tag new file
    NEWNAME=$(basename "$FILE" .m4a)'.mp3'
    echo "converting $FILE to $NEWNAME"
    faad -q -w "$FILE" |                          \
    lame --silent --preset standard               \
    --tt ${MYMAP[title]}                          \
    --ta ${MYMAP[artist]}                         \
    --tl ${MYMAP[album]}                          \
    --ty ${MYMAP[date]}                           \
    --tn ${MYMAP[track]}"/"${MYMAP[totaltracks]}] \
    --tg ${MYMAP[genre]}                          \
    - "${NEWNAME}"
done
IFS="$OIFS"