zoner(17:47:32)
In a lot of cases, games, etc, shoehorned their "general MIDI" musics out of adlib with uninspired instruments, etc. Very few things really took care of squeezing the most out of it
zoner(17:45:08)
OPL has multiple variants (OPL2, OPL3, etc), and within them there is variance depending on whether you're using the original Yamaha chip or some emulation thereof