Finally we can bypass the pesky problem pitch antenna . . . wah-wah's.
https://youtu.be/ethJfOyE8wE
Now All we need is a keyboard for the stepper motor and we will have made significant progress against a long standing issue.
Now if we want to still use the antenna with a stepper motor, of course we do, they have miniature soft plastic hands, which make great knob covers for theremins of any kind, so all we have to do is take a stepper motor, attach a rod to it with the miniature hand affixed to the end and place it in proximity to the pitch antenna so that the stepper motor can sweep the miniature hand across the entire pitch field. Controlling the stepper motor with a keyboard would enable the keyboard to track the miniature hand accurately thus assuring precision pitch play.
Perfection, finally!
I can hardly wait to see what you theremin builders come up with, and I am in the market for a theremin even easier to play than the model 302.
But keyboards are also prone to error. Maybe something like a piano roll for theremin . . .