Open the configuration for your keyboard shortcuts and add the following commands:
raise volume by each 5% (more than 100% possible, might distort the sound)
pactl -- set-sink-volume @DEFAULT_SINK@ +5%
reduce volume by each 5%
pactl set-sink-volume @DEFAULT_SINK@ -5%
mute/unmutes audio
pactl set-sink-mute @DEFAULT_SINK@ toggle
amixer set 'Master' 10%-
amixer set 'Master' 5%+
right left balance
amixer set "PCM" 0dB,-3.2dB
place it into /etc/rc.local for apply it with startup linux