/usr/lib/x86_64-linux-gnu/libsndfile.so is in libsndfile1-dev 1.0.25-10.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libsndfile.so.1.0.25
/usr/lib/x86_64-linux-gnu/libsndfile.so.1.0.25