When googling similar problems people are having with Nintendont, I noticed Eternal Darkness pops up very often, so I think maybe you're right about the streaming audio! This game has a Need for Speed!
I'm very pedantic with my GC games, and the original disc is in mint condition (bought it new back in the day and this is the first time I actually play it. Yes, shame on me
). No scratches at all, so I don't think my original disc is the problem.
But maybe the SD card!
After the help and tips from you guys I now did the following:
- changed my SD card loading Nintendont to a newer one, which is also big enough for GC games
- put verified Eternal Darkness PAL iso on that same SD card, instead of using original disk
Result: the game not only loads faster but also no stuttering music as of yet!
So the problem might have been slow SD card. Later on, I'm going to try loading only Nintendont from the card and play from the original disk just to experiment.
Thank you guys, I'll come back if the problems return