Global audio

Hi, I am able to turn the global audio off/on via a mute button. The trouble is my movie is in progessive clicks and every time my user clicks forward, a piece of audio is loaded into level 1 and the sound comes back on. Like its re-setting my initial command

Is there any way to constantly keep the global volume at 0 until I tell it to go back to 100 manually??

Thanks in advance

B