Speaking Machine by Wolfgang von Kempelen 1791
from the Book:
Mechanismus der menschlichen Sprache nebst der Beschreibung seiner sprechenden Maschine
Mechanism of human speech together with a description of its speaking machine
An experimental speech machine/organ by Kempelen before he started building the speaking machine.
This machine/organ could pronounce a, o, u, and an unclear e
individually
after another 2 years of experimentation, p, m, l.
The letters were connected to the keys but could not produce clear words when combined