"An early electromechanical instrument was the Telharmonium or Teleharmonium (also known as the Dynamophone), developed by Thaddeus Cahill in 1897. The Telharmonium was intended to be listened to using telephone receivers.Like the later Hammond organ, the Telharmonium used tonewheels to generate musical sounds as electrical signals by additive synthesis. An authoritative history of the Telharmonium is 'Magical Music from the Telharmonium' by Reynold Weidenaar, Scarecrow Press, 1995."
Title link takes you to more info on wikipedia. I ran into the image here and realized I hadn't put a post up on the teleharmonium yet..








































