Add something that makes it sound like a theremin

( Smash Monkey 2 Anyone know a good therapist in South Africa?, Wed 23 Apr 2025, 19:49, archived)

There is a lot of room to add modifications but
I don't fancy adding electronics. It's a mains powered device that I'd like to sell once I'm done with it...
( brb Monkhouse Stampede, Wed 23 Apr 2025, 20:49, archived)