1. A method of inputting and processing a search string comprising: entering the search string, including entering terms in said string using a first term that is linguistically specified and a second term that is entered using one or both of a term specified phonetically using delimited terms from a phonetic alphabet and a term specified by a voice command; and searching an audio source to determine scores for said search string at locations in the audio source, including for each of multiple location of the string determining a match score characterizing the likelihood that the search string is present at that location.