;;
vol)
shift
- send vol$*
+ send volume
+ curr=$(recv)
+ lvl=${2:-10}
+ case ${curr} in
+ # status change: ( audio volume: 115 )
+ "status change"*"audio volume"*)
+ vol=$(echo "${curr}" | awk '{ print $(NF-1) }')
+ case $1 in
+ up) : $(( vol += lvl )) ;;
+ down) : $(( vol -= lvl )) ;;
+ esac
+ send volume ${vol}
+ ;;
+ esac
;;
seek)
if [[ -n $2 && -z ${2//[-+]} ]] ; then