anchor.diff:    # quality 4~165kbps, 5~130 (lower is better): https://trac.ffmpeg.org/wiki/Encode/MP3
     # ffmpeg has its own quoting system, doesn't work well with single-quotes, so we redirect
     ffmpeg.exe -i pipe: -ar 44100 -vn -codec:a libmp3lame -qscale:a 4 -y "${OUT}" < "$1"
  -  
  +
     shift
   done
   ----
  
positive.code:   OUTDIR="$last"
    mkdir -p "$OUTDIR"
    echo "Output to: $OUTDIR"
    
    # Setting new arg list without the last arg (only files to convert are there now)
    set -- "${@:1:$(($#-1))}"
  fi
  
negative.code: while [ -n "$1" ]; do
    # if we get to the last param that is used as output dir, we can exit (not necessary after set above)
    #[ "$OUTDIR" = "$1" ] && exit
  
    OUT="${1%.*}.mp3"
    if [ -n "$OUTDIR" ]; then
      OUT="$OUTDIR/"`basename "$OUT"`
  