One day I’m sure I will figure out how to route a audio signal through a envelope after the filter stage. BUT… I’m trying to route it to both filters of a voice. In certain scenarios it would be neat to send, let us say, oscillator 1 to filter 2 and oscillator 2 to filter 1, but that would be difficult to do in a analog synth and the usefulness of that possibility is really not that big of a deal, especially since if I wanted to do that very specific thing I could just use my VA synth, but in reality the Analog Keys has a much better sound quality, so that outweighs the minor benefits in sound capabilities my VA synth has in certain areas.
AM modulation with external inputs certainly sounds fun, wish I could try it. but yeah. Like I said, tried setting the oscillators to be external inputs, held down keys, ran a sequence, no sound. Might be a issue exclusive to the analog keys and not the analog four MKII. No idea. I’ll mess around with it more later to see if I can get it to work.