determine diskette the filesystem

Dear Tom,

I have a diskette made by a music syntheziser keyboard. I mouted it with:
        mount  /dev/fd0H1440

When I do
            fdisk /dev/fd0
I get the message that it is not a DOS filesystem or a Sun filesystem.

But when I list the possible filesystems with l in fdisk I see that there
are  30 other filesystems.
Does anyone know how to determine the file-format on the disk?
Is there any application on the rtbtsystem that can do it for me?

Best wishes for 2003 for you and your family

--Piet