Early Voice Synthesis

[WA2SQQ]

I recall hearing an early voice synthesizer hooked up to a Radio Shack TRS-80. Never new that Bell Labs developed the first one for the 1939 Worlds Fair. The video within the linked page below is pretty interesting.

http://www.atlasobscura.com/articles/the-voder-the-first-machine-to-create-human-speech

[Opcom]

https://www.google.com/patents/US2121142
led to the vocoder and similar exciting equipment!
as used by Kraftwerk and Wendy Carlos.

I've studied whether or not a similar instrument could be used with a microphone and special audio carrier inputs to produce an extremely intelligible voice with a high degree of amplitude constancy. jury still out.