/usr/lib/x86_64-linux-gnu/libqm-dsp.so is in libqm-dsp-dev 1.7.1-2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libqm-dsp.so.0.0.0
/usr/lib/x86_64-linux-gnu/libqm-dsp.so.0.0.0