Hello. In RPG Maker, there isn't a Wait Till Completion for sound, only for movement route so you'll need to use Wait. This plugin only handle 3D Audio so it doesn't have a loop feature. If you want a sound to loop, make it a BGS.
Hello. Currently, you can play multiple BGS tracks using feature Region in plugin parameter. This way, BGS track won't be overrided. I'll make an update that provide more support for BGS so it covers more use cases in the future.
