in the game click on ~ and it will open up a console I believe the command is volume or audio set to 0 and i think it will mute the music it will turn off any other sounds so yeah :\
Now i know how to use console. Cuz i asked people around and was quite issue for me to find a way to use console.
In the new update there's a sandbox section in the tutorial and there's a terminal that works exactly like the console so yeah...
