/usr/lib/x86_64-linux-gnu/libSDL_sound-1.0.so.1 is in libsdl-sound1.2 1.0.3-7.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libSDL_sound-1.0.so.1.0.2
/usr/lib/x86_64-linux-gnu/libSDL_sound-1.0.so.1.0.2