Synths that work when I package a project for windows don’t work with the same project packaged for HTML5 - is this a limit of the synth plugin or is there a specific way to get it working?
What doesn’t work when you package?
Also, I don’t recommend trying to do anything major in HTML5 with UE4 – it’s an experimental platform at the moment. All things run on a single thread. That means anything you render with graphics will be on the same thread as anything you render with audio. This is not an idea environment for realtime synthesis.