apt-file search libpulsedsp.so
Finding relevant cache files to search ...E: The cache is empty. You need to run "apt-file update" first.
hajzer@hajzer-Default-string:~$ sudo find / -name libpulsedsp.so
[sudo] hajzer jelszava:         
/var/lib/flatpak/runtime/org.freedesktop.Sdk/x86_64/22.08/bbc4939499a091b2e676424ee5c85051f68f47d0dc3839bf8280befe53fa9be5/files/lib/x86_64-linux-gnu/pulseaudio/libpulsedsp.so
/usr/lib/x86_64-linux-gnu/pulseaudio/libpulsedsp.so
find: ‘/run/user/1000/doc’: Engedély megtagadva
find: ‘/run/user/1000/gvfs’: Engedély megtagadva
hajzer@hajzer-Default-string:~$ echo $LD_PRELOAD

hajzer@hajzer-Default-string:~$