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Until recently, it never occurred to me to use a ring modulator as a VCA. I typically have sizable systems with dedicated VCAs. But if I think about it, why wouldn’t it work? A ring modulator multiplies the X input signal by the Y or carrier signal. Essentially, this is how a VCA works, but the ring mod does not have a CV or gain control. Those with a small system already know this trick and save themselves space in their rack.
But what about a vacuum tube ring modulator? It’s a very different design than a solid state ring mod, even though they both perform a multiplication of the X and Y signals. The module uses tubes and transformers in a 1930s circuit design originally purposed for sending multiple telephone calls down one telephone line.
To test the properties of the Vacuum Tube Ring Modulator, I compared the Dual Lin/Log VCA alongside the Vacuum Tube Ring Modulator. Using the Dual Lin/Log VCA in logarithmic mode, the amplitude is what we expect. The note opens and closes the audio
When I first began my modular synth journey, I had no clue what I was doing. Now mind you, it wasn’t because I was unfamiliar with synthesis. In fact, I was well-versed in sound design. My first synthesizers were the Access Virus TI2 and Roland V-Synth—neither were “simple” synths. Instead, both share complex menus, matrix routing, and effects engines, to name a few. To this day, I spend hours programming the Virus and V-Synth, as well as other complex synths, for hours until I get a “good” patch. So why did I have such a hard time at the beginning of modular synthesis?
I underestimated how quickly my system would grow. At the time, I looked at my budget and decided on a Doepfer low-cost wood case. It had a total of 252HP or 3 rows of 84HP. For some readers, that may sound like a sizable case, and it is! With proper planning, I would be able to obtain all of the modules I needed. The problem was it didn’t take long to buy