macvol - set your Mac's volume from the command line

macvol

#!/bin/bash

# This simple script sets the volume on your Mac. Put it on your PATH.
#
# Usage: macvol [volume level]
#
# Without an argument, it returns the current volume level.  With an argument,
# it will set the volume level. The volume level may range from 0 to 100.
#
# I use this script to set the volume of my Mac Mini remotely from another
# computer over a SSH session.
#
# Author: Daniel Choi
#         [email protected]
#         http://danielchoi.com/software

if [ $# -eq 0 ]
then
  osascript -e 'get output volume of (get volume settings)'
else
  osascript -e "set volume output volume $1"
fi

Do you know if we can change specific app volume?