What& #39;s this box? Turns out it& #39;s a voice generator from the cold war era used for Short Wave radio stations, known as Number Stations!

[image: mfs-sammler, https://commons.wikimedia.org/wiki/File:Sprach-Morse-Generator.jpg]">https://commons.wikimedia.org/wiki/File...

They were used to transmit encrypted messages to spies. This particular device was developed in east Germany in the 70s, it& #39;s official, obscure name is "Gerät 32620".

Here& #39;s an original recording from the 80s: ">https://youtu.be/wxlrnAC7Y...

I always wondered what machines generated the voices, and was excited to find the technical documentation for this thing, with lots of details!

It uses a microprocessor, digital audio samples, voice cartridges can be swapped, output speed adjusted, it& #39;s just a pretty fancy device.

Join me on an in-depth journey through the documentation and as I try to decode the voice ROM dumps of Gerät 32620: https://blog.ardy.io/2020/8/geraet-32620/">https://blog.ardy.io/2020/8/ge...