Paper Mario Color Splash audio transition bug.
This bug is very hard, if not impossible to recreate and I know it has been reported before.
I personally think an order of things must happen to even trigger this. To me it looks like Cemu may occasionally read the audio wrong or confuse it, leaving garbled audio.
I've tried to recreate what I experienced, but weren't able to, which is a shame. Having this consistent would probably ease the debugging.
This bug became present for me walking through the "Ruddy Road" and interacting with everything on my path, like normal game play would expect you too, then passing the cafeteria the second time where audio would shift over to the second BGM track playing. Sounds like the encoding of the audio went wrong and trying a couple of times over, even with a standalone cemu setup which has never seen the game before would not trigger it again, yet my playtime while trying to recreate was much shorter.
I'll leave a save right before entering the area where I experienced it, a video clip displaying how the distortion works and another video walking through the same area where the bug has fixed itself.
I'm tempted to continue playing the game with logging the audio API, but it throws a lot of information to the log and imo is not trivial to work with.
Video showing the audio transition not working (it's very loud, so be aware):
Video showing the second walk-through hoping to catch it again, but didn't:
I wish I could edit my 1st post, but can't =/
So much for accidentally hitting "Enter" while typing comment of the attached file.
Video showing the second walk-through:
As a side-note, unsure if it matters, I have the "snd_user" and "snduser2" dumped and placed in my Cemu folder from my console.