A database of thousands of samples plus digital audio processing enables radio D.J. Carson Daly to do a synthesized, virtual top-10 countdown show tailored to the phoned-in requests of radio listeners in 11 different cities.

Phrases like “coming in at No. 4” were recorded once and stored in the database for reuse. The call letters and phone numbers of the 11 stations, in Mr. Daly’s voice, are automatically inserted.