Some might recall a thread I made here a while back, asking about an OPL2 or OPL3 styled soundfont, for purposes of getting that "classic" sound to every MIDI on my system. Well, over at the DigitalMZX forums, a fellow by the name of Anapan finally put together a huge resource devoted to many ways that this can be accomplished, from both software and hardware, or even as an SF2 soundfont. I'll just quote his post here:

Anapan wrote:

Bumping an old post (sorry) I found this topic a few times while trying to get the same thing. I ended up making a sorta bad sou […]
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Bumping an old post (sorry)
I found this topic a few times while trying to get the same thing.
I ended up making a sorta bad soundfont that almost sounds like OPL2 (conversion didn't work out quite like I planned, but it's usable) and some other OPL2 stuff as well and gathered it all into one place. Thanks for the info on IMF creator.

Old Soundcard Emulation instructions