#!/bin/bash
# Script to calculate audio track and album loudness values
# Christopher Hampson 11/02/2019
function calc # calculate whole album values
{
ALBUM_INT=`cat $ALBUMLUFS_VALUES | awk '{if(NR==1) print $3}'`
ALBUM_LRA=`cat $ALBUMLUFS_VALUES | awk '{if(NR==2) print $3}'`
ALBUM_TP=`cat $ALBUMLUFS_VALUES | awk '{if(NR==3) print $3}'`
ALBUM_MM=`cat $ALBUMLUFS_VALUES | awk '{if(NR==8) print $3}'`
ALBUM_STM=`cat $ALBUMLUFS_VALUES | awk '{if(NR==9) print $4}'`
}
LUFS_HEADER=$(mktemp)
FILENAME=$(mktemp)
LUFS_VALUES=$(mktemp)
ALBUMLUFS_VALUES=$(mktemp)
SCREEN=$(mktemp)
ANALYSIS=$(mktemp)
sox "$@" -t wav - | ebur128 --lufs --full - >> $ALBUMLUFS_VALUES &
date > $LUFS_HEADER
echo "LOUDNESS ANALYSIS" >> $LUFS_HEADER
echo "File,Int (LUFS),LRA (LU) ,TP (dB)" >> $LUFS_HEADER
for file in "$@";
do
echo `basename "$file"` >> $FILENAME
echo -n "," >> $LUFS_VALUES
ebur128 --lufs "$file" | tee $SCREEN | awk '{print $3}' | tr "\n" "," | sed 's/\(.*\),/\1/' >> $LUFS_VALUES
echo >> $LUFS_VALUES
echo
echo "$file"
echo
cat $SCREEN &
done
wait
sed -i 's/,//g' $FILENAME
paste -d "" $FILENAME $LUFS_VALUES > $ANALYSIS
cat $ANALYSIS >> $LUFS_HEADER
calc # calculates the whole album data
echo
echo "ALBUM:"
echo "Integrated loudness:" $ALBUM_INT "LUFS"
echo "Loudness range:" $ALBUM_LRA "LU"
echo "Peak level:" $ALBUM_TP "dB"
echo "Momentary max:" $ALBUM_MM "LUFS"
echo "Short term max:" $ALBUM_STM "LUFS"
cat > loudness_analysis.html <<'EOF'
EOF
while read INPUT ; do echo "| ${INPUT//,/ | } |
"; done < $LUFS_HEADER >> loudness_analysis.html
echo "|
" >> loudness_analysis.html
echo "| ALBUM | "$ALBUM_INT" | "$ALBUM_LRA" | "$ALBUM_TP" |
" >> loudness_analysis.html
echo "| MMAX | "$ALBUM_MM" |
" >> loudness_analysis.html
echo "| SMAX | "$ALBUM_STM" |
" >> loudness_analysis.html
echo "
" >> loudness_analysis.html
echo "
" >> loudness_analysis.html
rm $LUFS_HEADER $FILENAME $LUFS_VALUES $ALBUMLUFS_VALUES $SCREEN $ANALYSIS