AudioProcessorGraph Node Aux/Modulation Input

Hi,

I’m trying to use the AudioPluginHost as a base for a modulation matrix. I have no problems creating custom processors, that acts as a mod source (LFO) and mod destinations (filter). I read in the documentation that an audioprocessor can have none main bus inputs, but could not yet figure out how to use or assign them.

Question

Basically. how can I add an aux input to my subclass of audioprocessor and how does it show up in my buffer?