There are also quite a few software packages that implement analog synthesis techniques, like https://lumen-app.com/ and http://v002.info/about/
The eurorack modular synth boom is certainly introducing a lot of new people to analogue video synthesis. Exciting times!
Video? Eurorack and modular synthesizers of other format and kinds are about audio, right?
It’s all just voltage, but obviously with video oscillating at much higher rates.
You use most ‘audio’ modules with video modules and vice versa. All the typical logic works like divide, mult, add, etc.
It’s a really fascinating format!
The cost of entry is a ton of time learning from archaic resources, more time finding the devices and the money to accrue them.