I've never had or emulated a pc98 but every time I see pc98 content with music it always reminds me of the genesis/megadrive audio.
Discussion
nostr:npub184j0mdssstfxmqu8q02wpkgasau8tx5cr948teamyyre4fr4j6lqnfv7v5 it literally has the same sound hardware or rather an identical setup, but it's closer to the Sega 32x in the sense you have a PCM channel you can program on the later models. The older YM2203 has only 3 channels and 3 PSG channels.
As for emulation here's the translation zip: