though I am surely not Mr. Gwizdala, I have been learning a lot about synthesis and circuits and synth bass in the past couple of years...
first, get a good hold on subtractive synthesis, and on ADSR- attack, decay, sustain, and release, and finally get your ear around the waveforms- square, triangle, sawtooth, etc.
It seems convoluted, but I bought and sold a couple of synths, not knowing REALLY how to create what I wanted and needed.. but now that I have been learning electronics and how to build effects, I feel like I really understand the relationship between circuits and sound..
and never underestimate how useful information in even the worst youtube tutorial can be
I'd love to see what Janek has to say