This book details the early history of speech synthesis, particularly the Vocoder, which still finds use today as a music synthesis tool. What’s most interesting to me is the youtube video below of a 1940’s vocoder demonstration (see below). Think about the relative advances that have or haven’t occurred over the last 60 years. Certainly the intelligibility and naturalness have improved, but what about intonation flexibiity. Come on speech synthesis guys! Get on the stick!!!!!(link).