MZ-X500 Quartet Demo by BradMZ published on 2016-05-27T20:09:20Z This is a Casio demo ".mid" file that was originally supplied on a floppy disk with the MZ-2000. The new MZ-X500 takes the file into new sonic territory. Sounds amazing! Comment by Avid-Sound-XW-Addict. You're not making it easy this sounds exquisite simply marvelous. 2016-05-28T08:14:01Z