Searching for some good information on recording Theremin and Moogerfooger effects? Check out, Plug-in: The Home Recording Show.
The premier episode features Joe Ferrara, singer, songwriter, and
multi-instrumentalist for the band, Father Divine. Joe demonstrates
recording with the Etherwave Theremin, MF-102 Ring Modulator and MF-104Z Analog Delay.
This is not a quickie YouTube video. It’s an in-depth look at this subject with additional tutorials and background info available. It’s all couched in an offbeat sense of humor, and solid Theremin content starts about 3 minutes in.