I know Csound used to have vst4cs, which has been limited to binaries distributed by M Gogins. Is there another way for Cabbage to act as host and plugin simultaneously? The vst4cs opcodes have been removed from Csound because Steinberg insisted. I suspect that means old versions as well.
I don't really want to design a plugin of my own. I want users of my program to be able to choose from their own plugins, open one, and internally my plugin creates multiple instances of it, while the user only interacts with one instance through the existing GUI.
I know Csound well enough to code any of this within it. I just can't tell if Cabbage has any extra VST-hosting abilities I haven't come across.