Thanks for the response. Yu-No came out in 1996 and the pc98 itself came out in 1982, before even the Famicom, and used the Yamaha YM2608 chip. I know very little about sound engineering, but here's the Wikipedia page for it.https://en.wikipedia.org/wiki/Yamaha_YM2608
I'm pretty sure that the system is considered 16/32 bit. Anyway, it still shows the massive difference in effort between what people produced back then and modern, "retro", music, which also often doesn't fit 8-bit parameters. The third link, which was for the pc-88, is probably closer to mark when it comes to comparable technical limitations.