Use speakers from piano as sound output

Hello everyone,

I am using Kontakt 7 to use some piano liberaries. Atm i have a MIDI cable from my digital piano to my laptop. When i open kontakt 7 and load my library and play on the piano i hear the sound in my headset. But i wanted to know if there is a way to make te sound from the library come out the speakers of the digital paino. I already tried to set my digital piano as output but that didnt work. Someone that has experience with this stuff? And is it possible?