See the KORE 64 Kurzweil expansion right here: https://www.sweetwater.com/store/detail/KORE64ROM/
Mitch Gallagher sits down with Nick Gang, Soundware Engineer for Kurzweil. Nick created the sounds for the KORE 64 expansion ROM for PC3/PC3K workstations.
Mitch talks with Nick about what went into creating the sounds, as well as his background in music. At 6:54, Nick gives an in-depth demonstration of the KOR 64 sounds.
Enjoy the interview, then hear more sounds in the KORE 64 expansion at the link above!