Hi, so this might be a bit confusing/unconventional because I'm unsure whether it's 100% an RPG Maker or VisuStella thing
So I've been conceptualizing a multi layer audio plugin and I was testing sound and noticed that there's still a considerable delay in BGM (tested in blank new project) that are over about 4-5min, so I was confused, because I was testing around in the VisuStella sample project and BGM were playing instantly, I thought it was the core plugins at first, but it wasn't any of them, so I started checking the core files and I noticed rmmz_core in the VisuStella sample project seems to handle audio better than blank projects created from MZ (so basically RPG Maker generated core files), I don't know if this is just a by-case basis or a bug or something specific to VisuStella or RPG Maker.