Well, the synth will have 4 oscillators, 4 enveloppes, 4 filters, 2 lfo, some FX
But they will be grouped in tabs (using groups, visible(1) to show the active tab) and these tabs buttons, oscillators selection button for the enveloppes for example are already like 16 controls, but the user will just see tabs he can click to display one of the four envelopes available
So in from of the user, there are way less controls !