Hi Paul,I am not sure on the Kn1400 regarding sound edit, but you are not able to load wav. files directly into any of the KN range as far as I know. If you have a disc drive for extra sounds or styles try Technics Germany as they have FREE software to download at.www.technics-music-service.de
Best of luck John.
P.S. any orther KN users will find this site useful as it covers all keyboards and piano's.