28. A computing device as in claim 23 wherein said programming includes instructions for responding to the receipt of filtering input by: producing a filtered choice list of filtered recognition candidates, each comprised of a sequence of one or more words that agree with said filtering input and which have been selected by the recognition based on recognition scores against said uttered sound; and using said text-to-speech technology to provide spoken output to said speaker or audio output saying the one or more words of one of the recognition candidates in the filtered choice list.
29. A computing device as in claim 28 wherein said programming further includes instructions for using said text-to-speech technology to provide spoken output saying the current value of the filter.