Whatever they've done you can't adjust the audio, so the "battle" music is always loud.
Yeah this game needs that music so you know when there's danger, but having it really loud drowns out other sounds and it's just horrible imo.
Seems like the steam and switch versions have the same issue:
https://steamcommunity.com/app/25470...9191259345809/
https://gamefaqs.gamespot.com/boards...vil-4/77736118