Sharp FM synth tearing through your speakers like it's 1991. GENOCIDE2 on the X68000 has this MT-32 sound module soundtrack that hits way harder than any side-scroller has a right to. The STAGE 1-1 theme locks in immediately with driving basslines and that crispy Roland tone, and then STAGE 3-2 shifts into something almost prog-rock.
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BURNING (BOSS 1) brings this frantic energy that makes you grip the controller tighter. The whole OST cycles through moods fast, stage to stage, boss to boss, each sub-section getting its own identity. That MT-32 hardware gives everything a warmth that pure FM can't touch.
If you want to hear what Japanese devs could squeeze out of Roland sound modules in the early 90s, start here.