# Increase volume
"pactl set-sink-volume @DEFAULT_SINK@ +2000"
   XF86AudioRaiseVolume

# Decrease volume
"pactl set-sink-volume @DEFAULT_SINK@ -2000"
  XF86AudioLowerVolume
 
# Mute volume
"pactl set-sink-mute @DEFAULT_SINK@ toggle"
   XF86AudioMute

# Mute microphone
"pactl set-source-mute @DEFAULT_SOURCE@ toggle"
   XF86AudioMicMute