Two theremins walk into a ring modulator ... a dark thereminists' joke

Recently I acquired a Warm Audio Ringerbringer, a recreation in a smaller housing of the Moogerfooger 102 Ring Modulator pedal. Interesting things happen when one theremin is plugged in as the carrier signal and another one in the audio input and the two theremin sounds modulate and interfere with each other. The ring modulator heterodynes the two audio signals and produces sum and difference frequencies, similar to how within the theremin the RF signals of the variable and reference oscillator are mixed and heterodyne to produce the difference frequency within the audible frequency range. The sum frequency is RF and gets filtered out in case of the theremin.

Short outtake version on YT (44 seconds)

Full registration (9:11 minutes):
https://youtube.com/live/geN3Mw-s4is

Fun stuff DreadVox!  Ring modulation (i.e. 4 quadrant AM) can produce some crazy bass content!  And, as you point out, it can be a useful demonstration of the hetrodyning which analog Theremins rely on to produce wide range audio frequencies.

Some D-Lev AM presets:
https://d-lev.com/audio/2023-09-25_am_0-7.mp3
https://d-lev.com/audio/2023-11-19_lord_of_the_ring_modulator.mp3
https://d-lev.com/audio/2023-12-16_b3_am_fm.mp3

(I don't mean to hijack your thread with my stupid stuff!)

Not stupid at all. Very cool how your D-Lev can do such things internally, and how you obviously are developing your project with a lot of love and dedication.