Dial directory enquiries in a few years' time, and the chances are that the voice at the other end will come not from a human being, but from a machine. And this mechanical utterance will be more than a collection of pre-recorded phrases. It will be a synthesis of the basic elements that make up human speech.
In the first of two programmes Peter Evans examines the technology of speech synthesis, and talks to some of the machines and the people who trained them.
Research DEBORAH COHEN Producer GEOFF DEEHAN
(Machines with Ears tomorrow ot 7.20 pm) long wave only