Is AudioProcessorParameter compatible to an AudioProcessorValueTreeState

You should’ve dig a little :wink:

If you wish to have simple management you should use AudioProcessorValueTreeState but then you’ll write a lot of lambda (also restrict your code to C++11 supported compilers if that’s something you care about).
If you have few parameters you can enjoy the pre-configured AudioProcessorParameters you’ve suggested but you’ll need to write more management code.
Currently they’re not working as a whole.