We're focusing more on the mix down part as that's more objective and less subjective and Landr/Ozone already exist so we're not starting off specializing in mastering. With additional time/funding what I'd like to build is the ability to let the user specify a specific reference track and not just an artist for the AI to use as a reference.

To your question though, it's a chatbot so tell it you want your track to sound like eg Polo and Pan, it'll look for ways to enhance it in their style rather than a simple small/medium/large knob. It'll load one of the built-in mastering chains and tweak the settings on those, or if you have a preference, you can tell it that too.