Installing an AudioDSP

I’ve been having some issues lately with my setup.

I like to listen to music in 5.1 instead of stereo so I switch my amp to NEO:6, but if I do so this then messes up the channels for passthrough and I have to change my amp to pure direct.

The freesurround seems like something that would solve this issue by sending a 5.1 signal to the amp for both music and movies.

I can’t seem to find any guides for how to actually install the AudioDSP? I’m running Kodi my NAS which is Linux.