Download FractMus 2000

FractMus is an old windows application.  In order to work in Windows 10 you need to first install the following (freeware) applications:

CoolSoft Midi Mapper

CoolSoft Virtual Midi Synth

A general-purpose Soundfont Library for CoolSoft Virtual Midi Synth

If you are a Mac user you'll need to install it on a Virtual Machine running Windows. I recommend VirtualBox

Here you can watch tutorial on how to install Windows XP in VirtualBox

Download FractMus installer here