Here is the interface I’ve been working on. It’s almost completely implemented now. Each one of the geometric shapes controls a different parameter of the sound. By mentally “rotating” these controls clockwise and counter-clockwise you will be able to alter the desired aspect of the sound: like LFO depth and speed, frequency modulation, reverb, wave shape etc. Smirking left and right will change which control is selected. You can still force pitch up and down as well.