The Talking Pipes Machine
1989 artwork by Martin Riches produces acoustic voice synthesis with sculptured pipes - video demonstration below:
The Talking Machine is an acoustic speech synthesizer. The machine is arranged like an organ; a pipe for each speech sound. Each pipe consists of a noise-maker - a reed or whistle - and a resonator in the form of the inside of the mouth which filters this noise into the speech sound. The valves which supply the air to the pipes are driven by a computer. The machine has a vocabulary of a few hundred words in English. The visitor can enter sentences using these words and the machine will speak them: eg. “How I want a cigarette” (delivered in a monotone; all the pipes are tuned to the same pitch). It can also recite the alphabet and count to 100 in English, German and Japanese.
You can find out more here
In fact, Martin has been making talking machine artworks for years - an interesting interview from October 2013 can be found at motherboardtv here