Using Theremin to Modulate Pitch of an Input for Use in Sonic Screwdriver?

I'm not real familiar to the in depth functioning of the Theremin, but I think I have the general gist of how it works. Specifically, I was wondering If it was possible to use a Theremin to change the pitch of a sonic screwdriver. One of my qualms with sonic screwdriver replicas is that they lack the changing pitch of the screwdriver in the show (Doctor Who, to the uninitiated). After reading about Theremins, I wondered if one could be built into the case of a sonic screwdriver (DIY with metal case) allowing the pitch of the sound to be altered in relation to its proximity to the users hand(s) and the environment. Has anyone ever heard of something like this being done?

iceng4 years ago
You can make a TT ( Touch Thermin ) where how hard you press against two metal
pads or screws or rings on the screwdriver does both pitch and volume increase.

Theremins produce and modulate there own sound. Which sounds nothing like the sonic screwdriver. You have no way of feeding the screwdriver sound into the theremin to modulate. You need a circuit that can modulate any sound you feed into it. Search for a good sound modulator schematic. Though you may have trouble fitting it into the screwdriver. Best bet may be programing several sounds into the device and using a slider to switch between sounds.