I installed and tested OMNIFLOP with Windows 7 Ultimate (32‑bit) and also Windows XP (SP3). Omniflop Version: 3.0 32-bit / Build ID: b / MSID:

My first attempt at using OMNIFLOP failed because the MITSUMI Model D353M3D 3.5" Floppy Disk Drive (FDD) was incompatible with OMNIFLOP and the Roland disk format. I wanted to point out this drive in particular because the specifications say this model is able to read/write 1.44MB disks and also 720KB disks. However, for unknown reasons, the 720KB mode does not work with OMNIFLOP and this model FDD

So... I replaced it with a different brand floppy disk drive NEC 3.5" Floppy Disk Drive Model FD1231T‑134-506790‑430‑3. This new one works great. This model reads/writes both 720KB and 1.44MB disk formats. I have been able to create Boot and Sound Disks for the S‑50, S‑550, S‑330, W‑30 and S‑760 without any issues

OMNIFLOP requires an internal floppy disk drive.
3.5" External FDD's and 3.5" USB FDD's will not work

In order to get ONMIFLOP to work with the Roland 720KB and 1.44MB disk formats, you will need to install the OMNIFLOP FDD driver which is included in the *.ZIP file*. I followed the instructions in the PDF instruction file and the new driver install was hassle‑free

     OMNIFLOP DOWNLOAD OMNIFLOP can be downloaded here   S-50 / S-550 3.5 ICON

*One thing I would watch out for is that the OMNIFLOP driver will overwrite your existing Windows FDD drivers. You might want to play it safe and back-up any FDD drivers prior to installing the new OMNIFLOP driver

S-50 / S-550 ZONE