Synthesizers have been a major interest of mine since age 9 when my brother brought home the Switched-On-Bach Album, then ELP's stuff. A normal person could never afford a big synthesizer in the '70s since they cost more than a new car.
I built my first in 1977 and connected them to a computer in '79 before MIDI.
In the mid-90s after a career with computers and robotics I went back and revived my interest to create Synthesizers.com modular synthesizers. Here's some documentation for all that.