diff --git a/arch-config/Commands b/arch-config/Commands
index 1912a782..39ce7774 100644
--- a/arch-config/Commands
+++ b/arch-config/Commands
@@ -1,9 +1,11 @@
 #Normalize audio
 ffmpeg-normalize *.<format> -v -pr -c:a <audio codec> -ext <extension>
 Examples:
-ffmpeg-normalize *.opus -v -pr -c:a libvorbis -ext  ogg
+#ffmpeg-normalize *.opus -v -pr -c:a libvorbis -ext  ogg
 ffmpeg-normalize *.flac -v -pr -c:a flac -ext flac
-ffmpeg-normalize *.ogg -v -pr -ext wav
+#ffmpeg-normalize *.ogg -v -pr -ext wav
+ffmpeg-normalize *.m4a -v -pr -c:a libopus -ext opus
+ffmpeg-normalize *.opus -v -pr -c:a libopus -ext opus
 
 #extract images from video
 ffmpeg -i file.mpg -r 1/1 $filename%03d.jpg