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1780 https://de.wikipedia.org/wiki/Christian_Gottlieb_Kratzenstein
母音を出す装置を発明
https://gyazo.com/2de8374898e96b00f6af99b06edf05fe
https://ids-pub.bsz-bw.de/frontdoor/deliver/index/docId/4105/file/Brackhane_Kempelen_vs_Kratzenstein_2015.pdf
https://en.wikipedia.org/wiki/Voder
Whereas the vocoder analyzes speech, transforms it into electronically transmitted information, and recreates it, the voder generates synthesized speech by means of a console with fifteen touch-sensitive keys and a pedal. I
https://www.youtube.com/watch?v=5hyI_dM5cGo
ベル研究所 Homer Dudley