Your browser isn’t supported anymore. Update it to have the best YouTube working experience and our most up-to-date features. Learn more Physicist Werner Meyer-Eppler had been encouraged by Homer Dudley's 1948 creation in the Vocoder and began in 1951 to operate with a device referred to as a Melochord, in https://www.youtube.com/watch?v=M1nIb_K2rEo