Old Drobo FS as media server?


I just got the McIntosh MB50 and want to access iTunes but spoke with McIntosh who stated that since I have a Mac system, I need to have a NAS as the location of the iTunes. I do have a very old Drobo FS that still works as a back up.  Can I use this to stream music and if so, is there additional software that is required?

Otherwise what NAS drive would be advised?
ymc226