mute.applescript

set currentSettings to get volume settings
if input volume of currentSettings > 0 then
	set volume input volume 0
else
	set volume input volume 100
end if

tell application "System Events"
    tell process "NotificationCenter"
        set windowCount to count windows
        repeat with i from windowCount to 1 by -1
			click button "Close" of window i
        end repeat
    end tell
end tell

input volume of (get volume settings)