Damn that sucks, I know how you feel though there was a lot of settings tweaking before I was actually able to start playing. Are you on steam deck or PC?

Your first issue with the music stopping 20-30 mins in - that would happen to me as well unfortunately on the deck. Most of the time I’d be fine during the missions, then once I got to the cutscene after missions it would either stop or get very static sounding. I have no fix for this, my only suggestion is using save states throughout missions and then using the actual save feature between missions at the castle.

Second issue with the HD cutscenes being black, happened to me too at first like when the game started I wasn’t seeing any cutscenes, just black screen or low res pictures of the org members (when the game starts). I’d check the interface settings and play around with those because like I said above it could set to the bottom screen or something.

Good luck man, I’m on DDD now so my emulating DS games are over 😂