I don't remember where I got these from, but for my Lenovo Slim 7, which really needs the Dolby application on Windows to sound great (remembering that from early days of having it), it really enhances the whole sound by A LOT!
https://cloud.garudalinux.org/s/eimgmWmN485tHGw/download/game.irs
https://cloud.garudalinux.org/s/K8CpHZYTiLyXLSd/download/movie.irs
https://cloud.garudalinux.org/s/cbPLFeAMeJazKxC/download/music-balanced.irs
https://cloud.garudalinux.org/s/wJSs9gckrNidTBo/download/voice.irs
Put them to the .config/jamesdsp/irs directory and load them like this:
Music-balanced is by far the best one, imo.