The AC3 (Dolby Digital) tag confirms that the release retains multi-channel surround sound. In a film like Anna Karenina, where Dario Marianelli’s Oscar-winning score and the intricate sound design of the "theater" are crucial, having an AC3 track ensures the auditory experience isn't flattened into simple stereo. The Legacy of the PULSAR Release Group

It looks like you’re referencing a specific pirate release or torrent file name for Joe Wright’s 2012 adaptation of Anna Karenina

Since this file uses the XVID codec, it is a standard definition release. Most modern media players (like VLC or MPV) will play this without issues. If you are casting this to a smart TV, you may find that some newer models no longer natively support the XVID/AVI container, requiring transcoding via a server like Plex or converting the file to MP4.