/usr/share/doc/pd-csound/AUTHORS is in pd-csound 1:6.05~dfsg1-7build1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/pd-csound/../libcsound64-6.0/AUTHORS
/usr/share/doc/pd-csound/../libcsound64-6.0/AUTHORS