Some bright people in the '90's found a way to coax a PC computer to read the floppies, though. Since the Ensoniq EPS/ASR is really a specialized computer, and since the engineers really didn't forsee the need to have computers read the floppies, they came up with their own little 'private Idaho' format.
This is because Ensoniq samplers were made back in the time where floppy disk standards were not established yet. Floppy disks created by an Ensoniq EPS/ASR cannot be read by a normal Windows computer.