Would be great to toggle acknowledgement sounds from an event. ie. I'm using the system late at night so turn off the sounds used for On Mode, Standby Mode, Off Mode, Recognized.
I could also use it in my persona setup. If it's Alexander don't use the sounds, but if its Computer in Star Trek mode use the sounds.
And while I'm at it, how about one for when it does not recognize what is said. Perhaps within a certain confidence range ie. if confidence is set at 50% play the sound for anything between 30-49% and ignore anything lower to weed out the random noise from open mics driving you crazy.