Zone Radio Mute.
 

Is there a way to mute the radio? Its annoying when some noob keeps saying "base 1 base 1", about 100 times in a minute. I hate playing games with no sound so turning speakers down doesn't cut it for me either.
I really thing there should be a mute button if not one already.

yes. press either f3 or f4 and go to radio then pull it to the bottom.