A few months ago, the theremin was able to be tuned to a normal pitch range with a few octaves spanning a few feet in distance.
After about a month, I’ve tried playing the theremin but something weird has happened. The pitch range control has shifted so that when the knob is all the way counterclockwise, all the octaves are within 3-4 inches. If I adjust the knob the other way, the pitch becomes backwards (if I move my hand away the frequency increases).
What could have caused this and what can I do to restore the pitch range? I’d like to compose music for theremin later this semester so any advice would be helpful!