EASY TO USE SOFTWARE

I, too, am a pensioner, 'backing into' electronic music as I feel the need for each new function (and I do find it a kind of escalator - more of that below). I have tried most of the available midi/notation software, and find Notation gives me far the best combination of quality staff notation and audible playback, with ease of learning and editing, and value for money.

I came to the Forum today with a question in mind. I'm not sure where to post it, to be honest. Nowhere immediately stands out as the right place, and as this section is in a sense the converse of what I want to know, I may as well start here. Please redirect me if appropriate.

My question is:
I came to Notation Composer for software that would read and play midi files, and help me to create them. I shall shortly be bringing a second keyboard into my set-up, mainly because it is physically (i.e. to play) the best one I have. I shall continue to want to use another one (as at present) as a sort of slave synth i.e. the actual source of my voices.
Can I use NC as an interface between them e.g. the place where I select my voicings - when playing LIVE i.e. with no recording going on ?

Happy Twelfth Night to all

Ian DG