The Voder - Homer Dudley (Bell Labs) 1939

Caption notes

This historical Voder demonstration presents synthetic speech as a practiced performance. The host introduces the filters and sound sources, then asks the operator to change emphasis, pitch, and expression. Helen Harper explains that producing one word requires a sequence of sounds coordinated with a wrist bar and foot pedal, all with accurate timing. She says proficiency took about a year of sustained practice. The closing discussion describes the machine as an educational exhibition. The useful question is how the operator’s timing and articulation work together with the instrument’s sound-producing mechanisms. These notes follow the spoken explanation, with the original recording available for judging the resulting voice.