/usr/lib/x86_64-linux-gnu/libroardsp.so is in libroar-dev 1.0~beta11-1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libroardsp.so.2
/usr/lib/x86_64-linux-gnu/libroardsp.so.2