The Watford electronics bbc speech synthesizer uses an allophone system to give the user an unlimited vocabulary and the capability to speak any english word. The advanced software described in this manual offers the user a built in word library, and a 62 allophone buffer under interrupt control with access from any language via the *TALK command, OSBYTE, OSWORD and *FX25. It has been specially designed so that the user can design his own words to be spoken. Use of a speech buffer means that the computer can carry out the user's programs while the unit is speaking with minimal effect on program speed.
The speech synthesizer consists of a box with a built in speaker and volume control, a lead to connect with the computer and a jack socket for connection to an external amplifier such as your Hi-Fi or personal radio/tape player.
