diff --git a/to_opus.sh b/to_opus.sh
deleted file mode 100644
index 799118d..0000000
--- a/to_opus.sh
+++ /dev/null
@@ -1,63 +0,0 @@
-#!/bin/bash
-
-# set shopt-options used by this shell-script
-# Note, 0 (true) from shopt -q is "false" in a math context.
-shopt -q globstar; globstar_set=$?
-((globstar_set)) && shopt -s globstar
-shopt -q extglob; extglob_set=$?
-((extglob_set)) && shopt -s extglob
-
-# return default shopt-options
-function finish {
-	((globstar_set)) && shopt -u globstar
-	((extglob_set)) && shopt -u extglob
-}
-trap finish EXIT
-
-
-# setting default extension to mp3
-if [ $# -eq 0 ]; then
-	extension="mp3"
-else
-	extension=$@
-	extension=${extension// /|}
-fi
-
-
-for file in **/*.@($extension); do
-	
-	#set a channel-dependent  bitrate for every audio stream
-	command=$(
-		ffprobe "$file" -v 0 -show_entries stream=channels,bit_rate -select_streams a -of compact=p=0:nk=1:s="\ " |
-		awk -v file="$file" -v file_output="${file%.*}.opus" '
-			BEGIN{
-				ORS=" ";
-				print "ffmpeg -i \""file"\" -map 0:a -c:a libopus"
-			}
-			{	# https://wiki.xiph.org/Opus_Recommended_Settings
-				if($1==1) print $2>=64000 ? "-b:a:"NR-1" 64k" : "-b:a:"NR-1" "$2
-				else if($1==2) print $2>=128000 ? "-b:a:"NR-1" 128k" : "-b:a:"NR-1" "$2
-				else if($1<=6) print $2>=256000 ? "-b:a:"NR-1" 256k" : "-b:a:"NR-1" "$2
-				else print $2>=450000 ? "-b:a:"NR-1" 450k" : "-b:a:"NR-1" "$2
-			}
-			END{
-				print "\""file_output"\" -v info -hide_banner"
-			}')
-
-
-	is_video=$(ffprobe -i Hair.m4v -v fatal -select_streams V -show_entries stream=codec_type)
-	if [[ -n "$is_video" ]]; then
-		echo "$file is a video file and will not be converted"
-
-		#an Example for converting the audiostreams in a container while copying subtitles and videostreams.
-		#ffmpeg -i Hair.m4v -map 0:a -map 0:s -map 0:v -c:a libopus -c:v copy -c:s copy Hair.mkv -hide_banner -v info
-
-		#for extracting the audiostreams of a video file just use "eval "$command"".
-		#it is recommended to check the result before deleting the original file.
-	else
-		eval "$command" && rm "$file"
-	fi
-
-done
-
-exit 0