Android application package for Dolby Atmos Lite, a signed build with a Chinese-localized interface aimed at TV devices, according to the name. It is a software APK, not a repair document, and it is installed through sideloading on an Android TV box or set-top unit. The name does not state a target device, chipset or Android version, so compatibility is unknown. Install only on a test device first. Modified sound packages can conflict with the existing system audio framework, so keep a way to uninstall or restore the original state.
The button opens the matching file on RM Schematics, or a source page if it is not catalogued there yet. The original attachment is from @tv_software. Enginerys does not host this file.