I’d like to share with the community this plugin that i just found.
It is a digital waveguide piano physical model, it is open source and it is available also for mac, win and linux.
I haven’t tried it yet, just quickly listen to the sounds which seems okish, but it features a lot of parameters to model the sound of the piano, so it may be very powerful.
It may not be the ultimate free alternative for pianoteq, but since there is quite a scarcity of free plugin for modelled pianos, it definitely worth a shot, and could be a nice addittion to the raspian engines.
Thanks and have all a nice day.