fix md5 detection

system=$(uname -s)

# check, whether we have set md5 correctly

if

	! command -v $md5 &

	>/dev/null

then

	echo "Executable for calculating md5 could not be detected. Aborting."

	exit

fi

if [ "$system" = "Darwin" ]; then

    md5 -r cat?/c??/*.wav | awk '{print "MD5"toupper($1)".\\"$2 }' | tr -s '/' '\\' >$1

else