ok, that worked! thank you. i now have the example working. looking at it, i don't quite get, where i would put the plugin name in to test if mine works, all i see in render.cpp (and some of the other files i checked) is a URL mention of the plugins that it loads. so not sure where i would put in my plugin there.
but, first things first, here is the GitHub of the autotune plugin:
when i try to compile it on the BELA it drops a lot of missing library errors. i was able to install quite a few but i need a libpango-dev as well, i guess this is named differently on the BBB/Bela. any ideas?
also, actually i would not need to compile all the graphics stuff of the plugin, but for the moment i am not sure how to do that...