The best part is the authentic OPL chip. I thought the midi quality was good from the 3.5mm. Does it have a buzzer/speaker for game sound effects? I remember there being an old janky driver that would attempt to output PCM through the buzzer. All I ever got out of it was disappointment before I got a SB16.
I run Windows 3.1 still myself ... On my fold 3 though. Still some old games from my childhood I still love playing!! The folds inner screen aspect ratio is PERFECT for stuff like this and emulation.