Any info out there on this CD...?

[MJJDC]

I picked up this CD some months ago at a record fair for something like £20. I'm pretty sure that it's not worth much, possibly not even what I paid, but I find it fascinating and am keen to learn more about it;

So it's clearly a CD ROM from 1994 and contains little more than a series of MIDI and a few PC .EXE files but I simply don't understand what it's all about and what it was used for? Was it retail CD or perhaps some kind of promo material? If you have any info about it, I'd love to hear it

Thanks