A significant example of the first use of Hungarian speech technology was the spoken time-sound stamped political speech. The time-sound stamp was a speaking clock mixed with the recorded sound of the speaker. It was used to protect against possible subsequent cutting. The sound of the clock was generated automatically by a speech synthesizer. This speech technology solution was used in the recording of János Kádár’s last speech on April 12, 1989. The point is that during recording, regardless of the speaker’s voice, the current time is spoken automatically by the speech synthesizer every 10 seconds, followed by a beep (for example: April 12, 16:19, 40 seconds + beep). The development was carried out by the Department of Telecommunications and Telematics of the Technical University of Budapest (by dr. Géza Németh). The current time was read by the Hungarian Multivox speech synthesizer under the control of a microprocessor based time clock, and it was mixed with the voice of the speaker automatically.