The Voder was an early attempt at speech synthesis developed by Bell Telephone Laboratory for the 1939-40 New York World's Fair. Controlled by hand, the operator manually forms each syllable using complex button sequences, and it would take about a year of practice to able to produce fluid speech. This application allows you to put yourself in the shoes of the few women capable of operating the Voder.
Try create vowel formants pressing the button combinations below on your keyboard:
- D + V + J: [AH] as in "father"
- A + K: [EE] as in "heed"
- A + D: [OO] as in "pool"
You can also use the spacebar to create unvoiced noise. For example, try pressing the spacebar and immediately hit the key sequence for [EE]. This will emulate the word "see".