Previous ImageNext Image Helmholtz’s apparatus for the synthesis of sound, made by Rudolph Koenig. Image © Thomas B. Greenslade Jr. Individual Electromagnetic resonators with a keyboard Like this:Like Loading... Share this:Click to share on Facebook (Opens in new window)Click to share on Tumblr (Opens in new window)Click to share on Pinterest (Opens in new window)Click to share on Twitter (Opens in new window)Like this:Like Loading...