This machine pronounces, in a monotone voice, a string of numbers used by intelligence agencies for one-way shortwave radio communication with their agents in enemy countries. This machine belongs to a German collector who has a vast collection of various spy-gadgets. There were many machines of this particular model produced in East-Germany for usage within the DDR itself or other communist bloc nations, like the Soviet Union or Cuba.
The voice for this machine comes from a swapable printed circuit board with EEPROM's on it. On these EEPROM-chips resides the actual voice samples of the German lady. These EEPROMS enabled the machine to pronounce the numbers and other characters in Spanish or other languages depending on which card was inserted on the back of the machine. THE EEPROM's NEVER CONTAINED THE ACTUAL MESSAGE. In this video the so-called Speech/morse generator, or "Sprach/morse generator" (as it was referred to in Germany) had the voice and language of "the German Lady" loaded.
The Speech/morse generator can also change the speed of which the pronounciation occurs. Giving the voice a slightly higher or lower pitch. A later video in this series will make this apparent.