Turning off the UMI Voice

I've tried that by going to lower right corner (kind of a sideways u with an arrow) and push in the controller knob. It may be different for the Command system but I'm assuming its got to be similar with the UMI. I just can't seem to end the verbal Navigation directions unless I turn the vehicle off for a while or when I've reached the destination I programmed in. It even comes back on after a lengthy pit stop.



