hey, Johnny - I don't think we're talking about "real time" the same way. my definition of "real time" is the same as recording at project speed. if you're playing (or recording) the project with the timeline moving you can't enter notes on the PRV at the same time that the timeline hits a particular place.
maybe I'm the one misunderstanding here, but from what I'm understanding of the OP's question, you can't enter notes in "real time" without recording them via MIDI controller.