perhaps its from this company
Midi Quest was first released in 1989 for DOS, the AMIGA, and ATARI ST platforms and is the oldest actively supported software dedicated to getting the most from your MIDI hardware. And, Midi Quest was based on a previous 5 years experience creating software to support specific instruments such as the DX7, DX7II, D-50, M1, K1, and many others. And before that? Well, before that there was no MIDI.