/usr/lib/ is in libroar-dev 0.4-2.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/ckport/
/usr/lib/ckport/db/
/usr/lib/ckport/db/libroar.ckport
/usr/lib/pkgconfig/
/usr/lib/pkgconfig/libroardsp.pc
/usr/lib/pkgconfig/libroar.pc
/usr/lib/pkgconfig/libroareio.pc
/usr/lib/pkgconfig/libroarmidi.pc
/usr/lib/pkgconfig/libroarlight.pc
/usr/lib/libroarpulse.so
/usr/lib/libroaresd.so
/usr/lib/libroarpulse-simple.so
/usr/lib/libroareio.so
/usr/lib/libroarlight.so
/usr/lib/libroarmidi.so
/usr/lib/libroar.so
/usr/lib/libsndio.so
/usr/lib/libroaross.so
/usr/lib/libroarsndio.so
/usr/lib/libroardsp.so
/usr/lib/libroaryiff.so