/usr/share/man/man1/ffado-test-isoxmit.1.gz is in ffado-tools 2.2.1-3.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/man/man1/ffado-tools.1.gz
/usr/share/man/man1/ffado-tools.1.gz