I have an idea, so I'll probably write it down soon and update the library.
If you come up with one, let me know, so I can use it.
Since it's possible to implement this feature in scripts with the existing system, I'll probably write them quite soon.
Currently when you play a sound (a sound fx type) repeatedly, the sound itself gets 'restarted' and not being layered (GM's built-in sound system layers ('chorus') sounds when repeatedly played). In other words, the sound isn't 'multishot'. It would be nice if you add a 'multishot' option for soundfx types (In the old GM 5.3a that option is called 'buffers') I hope you would consider this