Actually my understanding is that you can use a computer keyboard to very rapidly enter lots of notes quickly and precisely without relying on your own human limitations as you would with a musical keyboard. I've seen it billed as sort of like Vi for music.
Yes, I'm pretty sure you can set FT2 in a record mode and then "play" notes on your computer keyboard, but I don't think that's what OP is asking.
How I understand OP's question is; you make a drum pattern in FT2 which you can trigger to play by pressing a key on a musical keyboard. I think the context of OP's question is for during a live/real-time performance.
