The original Alien Blu-ray features a DTS-HD MA 5.1 track. This is significant because:
is awakened from cryo-sleep to investigate a distress signal from a desolate planet The Discovery: Alien.1979.Directors.Cut.1080p.BluRay.x264.DTS-WiKi.mkv
Observant readers will note: there is no 4K or HDR tag. This release predates the 4K Blu-ray of Alien (released in 2019 for the film's 40th anniversary). The 4K disc features a stunning Dolby Vision HDR grade and a remastered DTS:X audio track. However, many collectors still keep the 1080p WiKi encode for compatibility with older projectors or Plex servers. The original Alien Blu-ray features a DTS-HD MA 5
Why does that matter?