@hisefilo Just wanted to chime in about this work here:
Building AI Enhanced Audio Plugins by Matthew John Yee-King
https://github.com/yeeking/ai-enhanced-audio-book
I am just finishing the work and its a great starter for training in Torch then building in the JUCE framework. I haven't tried HISE integration yet (I didn't know the API was updated either). I am happy to share the pdf if you are interested!