Even so, if you can manage to get a agent into the loop of "change variable > inspect results > do change > repeat", you can replicate everything from server-side game servers to audio effects, as long as you manage to get the data into a format they can either "visually" inspect, or inspect by data. For audio, I've had success replicating synth sounds and effects by giving them MIDI access to analog hardware, spectrograms and a suite of other unix tools.

The tricky part is figuring out the workflow, once that's in place, you can encrypt the protocol itself as much as you want, the output (audio, video, JSON, whatever) has to go somewhere, and that can be captured and replicated.