Located in Michigan. The Vox Humana is uniqie. The unit that turns it is mounted to the far left of the windchest. The speed is controlled by how far the knob is pulled. The air motor connects to the rotating fan blades by a woven cord. (It resembles a jump rope swinging which in turn rotates the cyclinder with two curved fan blades. There is also a wooden panel that extends from the reedbox out to the fan blades to direct the sound into the rotating cylinder. See picture