Try it..isn't gonna hurt anything..See if you can use a small PA/amp to fill the room with sound..Cut back on the digital effects on the program too{reverb ect.}..Good luck
Never tried it, but i have read about people putting a monitor inside a grand piano, and then playing back the recorded digital piano/keyboard through the monitor, and micing the result.
Supposed to give you the realistic sympathetic vibrations of the strings in the piano, as an ambience effect.