Mapping hardware keys for audio

i3/config

@@ -102,6 +102,9 @@ bindsym $mod+Shift+r restart
 bindsym $mod+Shift+e exec "i3-nagbar -t warning -m 'You pressed the exit shortcut. Do you really want to exit i3? This will end your X session.' -b 'Yes, exit i3' 'i3-msg exit'"
 
 bindsym XF86AudioMicMute exec pactl set-source-mute 1 toggle
+bindsym XF86AudioLowerVolume exec pactl set-sink-volume 0 -1000
+bindsym XF86AudioRaiseVolume exec pactl set-sink-volume 0 +1000
+bindsym XF86AudioMute exec pactl set-sink-mute 0 toggle
 
 # resize window (you can also use the mouse for that)
 mode "resize" {