Global Mute ?

Hey I created a part of my game and I thought it would be a good idea to add some mute button. im not a professional at using logics so the only way I know is to make like that:
Keyboard S (for example) - Controller - Sound (sound name)
Property ‘Sound = True’ /
Message ‘Mute Button Pressed’ - Controller - Property 'sound = False
Message ‘Mute Button Unpressed’ - Controller - Property 'sound = True

The fact is that to do this in all sounds is BORING so I thought if there is a way to make it like an actulator saying that blender will stop producing sounds at all.