No music in Suit o Nuida ato

[epenthesis]

I actually thought there wasn't any music for a long time, but then I briefly had it working after a reinstall on my new computer. Unfortunately, after I added the voice pack, the music died again. Anybody have some thoughts about what might be going on? (It's kind of amazing that the game still runs at all, so I'm not going to be too upset if it's a lost cause.)

[epenthesis]

Followup 5.5 years later. I just installed it on another PC, then on Steam Deck, and the issue is the same. Anybody else encounter this bug?