diff --git a/compress-music.sh b/compress-music.sh
index a6da9db..4dfa546 100755
--- a/compress-music.sh
+++ b/compress-music.sh
@@ -14,12 +14,10 @@ cd "$source"
 find . -type d -exec mkdir -p "$destination/{}" \;
 
 # copy existing files
-find . -type f -name '*.mp3' -exec cp --reflink=always "{}" "$destination/{}" \;
-find . -type f -name '*.m4a' -exec cp --reflink=always "{}" "$destination/{}" \;
-find . -type f -name '*.ogg' -exec cp --reflink=always "{}" "$destination/{}" \;
+find . -type f -and \( -name '*.mp3' -or -name '*.ogg' -or -name '*.m4a' -or -name '*.opus' \) -exec cp --reflink=always "{}" "$destination/{}" \;
 
 # set +e because ffmpeg errors on .jpg, .txt, etc.
 # compress with mp3
 set +e
-find . -type f | parallel --eta --progress 'ffmpeg -v 0 -n -i ""{}"" -c:a mp3 -b:a 320 -map_metadata 0 ""$destination/{.}.mp3""'
+find . -type f -not -name '*.mp3' -not -name '*.ogg' -not -name '*.m4a' -not -name '*.opus' | parallel --eta --progress 'ffmpeg -v 0 -n -i ""{}"" -c:a mp3 -b:a 320 -map_metadata 0 ""$destination/{.}.mp3""'
 #set -e