sudo cp /path/to/script/aosd.sh /usr/bin/aosd.sh

# volume settings, use 'xev' in terminal to find keycode(s)
Mod4 21 :Exec aosd.sh volup     # <super>+<=> 
Mod4 20 :Exec aosd.sh voldown   # <super>+<-> NOT KEYPAD MINUS 
Mod4 19 :Exec aosd.sh mute      # <super>+<0> NOT KEYPAD ZERO, this is a mute toggle

#!/bin/bash
#================================================================================
## mixer-osd
# Modified from the work of jelloir and slapfish on the CrunchBang
# Modified more by dh2k @ http://www.linuxquestions.org/questions/slackware-14/
# dholl2000 at gmail dot com
### 
#================================================================================

# Some user-defined values
MIXERNAME="Master" # The name of the amixer master device
GRANULARITY=32 # The approximate number of possible volume positions allowed
FONTSIZE=32 # The size of font used by the OSD display
MUTETOGGLE='muted'

# Pull the numerical limit from the Mixer
LIMIT=$(amixer get $MIXERNAME | grep "Limits" | awk '{print $5}')

# Set volume increment based on granularity
let VOLINC=LIMIT/GRANULARITY
let volmod=LIMIT%GRANULARITY
let threshold=GRANULARITY/2
if [ $volmod -gt $threshold ]; then
   let VOLINC=VOLINC+1
fi

# Command line handler
case $1 in

   volup) (amixer set $MIXERNAME $VOLINC+) ;;

   voldown) (amixer set $MIXERNAME $VOLINC-) ;;

   mute) (amixer set $MIXERNAME toggle) ;;

   *) 
      echo "Usage: $0 { volup | voldown | mute }"
      exit
      ;;

esac

# Detect mute status and set OSD color
MUTESTATUS=$(amixer get $MIXERNAME | grep "Left:" | awk '{print $7}' | tr -d '[]')

if [ $MUTESTATUS == "off" ]; then
   OSDCOLOR=red; else
   OSDCOLOR=green
   MUTETOGGLE=''
fi


# Create the "I" bar based on mixer setting and granularity
volset=$(amixer get $MIXERNAME | grep "Left:" | awk '{print $4}')

let volcounter=volset/$VOLINC
if [ $volcounter -gt $GRANULARITY ]; then
   volcounter=$GRANULARITY
fi

OSDI=""

while [ $volcounter -gt 0 ]
do
   OSDI=`echo $OSDI"I"`
   let volcounter=volcounter-1
done    

# Clean up any running aosd_cat processes
killall aosd_cat &> /dev/null

# Display the "I" bar  
# *** COMMENTED OUT AS TO LEAVE AS AN OPTION; 
# I PERSONALLY LESS IS MORE ;-)
#echo "$OSDI" | aosd_cat   -n "Sans $FONTSIZE" -u 1000 -o 200 -R $OSDCOLOR -S none -f 0 -y -10 &
#echo "$OSDI" | aosd_cat   -n "Sans $FONTSIZE" -u 250 -o 100 -R $OSDCOLOR -S none -f 0 -y -10 &
#vol=`amixer get $MIXERNAME | grep "Front Left:" | awk '{print $5}'`; 
#echo Vol $vol | aosd_cat   -n "Sans 16" -u 1000 -o 200 -R $OSDCOLOR -S none -f 0 -y -64

# NICE AND SIMPLE
vol=`amixer get $MIXERNAME | grep "Front Left:" | awk '{print $5}' | grep -oE "[[:digit:]]{1,}"`
echo volume: $vol% $MUTETOGGLE | aosd_cat   -n "Sans 16" -u 500 -o 100 -R $OSDCOLOR -S none -f 0 -y -64

# END

mpc | head =n 1 | aosd_cat -R white -n "dejavu sans 30"