on toggleMute()
    set _muted to (get (output muted of (get volume settings)))
    if _muted is false then
        set volume with output muted
    else
        set volume without output muted
    end if
end toggleMute

toggleMute()

tell application "PandaBar"
    activate
end tell

delay 5

tell application "System Events" to key code 100 using command down

toggleMute()