/usr/lib/synthv1/libsynthv1.so.0 is in synthv1-common 0.8.6-1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/synthv1/libsynthv1.so.0.8.6
/usr/lib/synthv1/libsynthv1.so.0.8.6