#split the filename by the sussy symbol. take the 0th element and store it as the track number for mp3. then concatenate the rest back together and rename the file
IFS='ඞ'
read -a arrfile <<<$file
track="${arrfile[0]}"
arrfile=("${arrfile[@]:1}")
newfilename=''
for namepart in "${arrfile[@]}";
do
newfilename+="$namepart"
done
mv "$file""$newfilename"
file="$newfilename"
#use ffmpeg to set the title, artist, track number, and album name to a new file, then rewrite the old file with the new file